REGISTRATION AGREEMENT

Exhibit 4.3

REGISTRATION AGREEMENT

This Registration Agreement is made as of January 25, 2007, among Metal Services Acquisition Corp., a Delaware corporation (the “Company”), and the Persons listed on Schedule A attached hereto and such other stockholders of the Company as may, from time to time, become parties to this Agreement in accordance with the provisions hereof (the “Investors”).

The Investors have entered into either a (i) subscription and contribution agreement or (ii) subscription agreement (collectively the “Equity Investment Agreements”), dated as of the date hereof, pertaining to the Investors’ investment and/or contribution to the Company. In order to induce those Investors which are parties to the Equity Investment Agreements to enter into their respective Equity Investment Agreements, the Company has agreed to provide the registration rights set forth in this Agreement. Unless otherwise provided in this Agreement, capitalized terms used herein shall have the meanings set forth in Section 9.

The parties, intending to be legally bound hereby, agree as follows:

1. Demand Registrations.

(a) Requests for Registration. Subject to Sections 1(b) and 1(c), at any time, the Majority Onex Investors may request registration under the Securities Act of all or part of their Registrable Securities on Form S-1 or any similar long-form registration (“Long-Form Registrations”) or, if available, on Form S-2 or S-3 or any similar short-form registration (“Short-Form Registrations”). In addition, at any time after the consummation of a Public Offering, the holders of a majority of the Registrable Securities may request Long-Form Registrations or, if available, Short-Form Registrations of all or part of their Registrable Securities until such holders cease to hold at least 10% of the number of Registrable Securities held by such holders as of the date hereof. Each request for a registration under this Section 1(a) shall specify the approximate number of Registrable Securities requested to be registered and the proposed method of distribution. Within 10 days after receipt of any such request, the Company will give written notice of such requested registration to all other holders of Registrable Securities and, subject to Section 1(d), will include in such registration all Registrable Securities with respect to which the Company has received written requests for inclusion therein within 15 days after the receipt of the Company’s notice. All registrations requested pursuant to this Section 1(a) are referred to herein as “Demand Registrations.”

(b) Long-Form Registrations. The holders of a majority of the Registrable Securities will be entitled to request, at the times and subject to the conditions set forth in Section 1(a), three Long-Form Registrations in which the Company will pay all Registration Expenses and the Majority Onex Investors will be entitled to request an unlimited number of Long-Form Registrations in which the Company will pay all Registration Expenses (“Company-Paid Long-Form Registrations”). A registration will not count as one of the permitted Long-Form Registrations until it has become effective (unless such Long-Form Registration does not become effective due solely to the fault of the holders requesting such registration and such holders do not bear all Registration Expenses in connection therewith); provided that in any event (absent an agreement by the holders requesting such registration to bear such expenses) the Company will

pay all Registration Expenses in connection with any registration initiated as a Company-Paid Long-Form Registration whether or not it has become effective. All Long-Form Registrations shall be underwritten registrations.

(c) Short-Form Registrations. In addition to the Company-Paid Long-Form Registrations provided pursuant to Section 1(b), the Majority Onex Investors and, at the times and subject to the conditions set forth in Section 1(a), the holders of a majority of the Registrable Securities will each be entitled to request an unlimited number of Short-Form Registrations in which the Company will pay all Registration Expenses. Demand Registrations will be Short-Form Registrations whenever the Company is permitted to use any applicable short form. After the Company has become subject to the reporting requirements of the Securities Exchange Act, the Company will use its commercially reasonable efforts to be and remain eligible to use Short-Form Registrations for the sale of Registrable Securities. The Majority Onex Investors may require that any Short-Form Registration provide, pursuant to Rule 415 under the Securities Act or any successor rule, for the continuous offering and sale of Registrable Securities through market transactions and such methods of distribution as the Majority Onex Investors may reasonably request (a “Shelf Registration”). Each request for a registration under this Section 1(c) shall specify the approximate number of Registrable Securities to be registered and the proposed method of distribution.

(d) Priority on Demand Registrations. The Company will not include in any Demand Registration any securities that are not Registrable Securities without the prior written consent of the holders of at least a majority of the Registrable Securities included in such registration. If a Demand Registration is an underwritten offering and the managing underwriters advise the Company in writing that in their opinion the number of Registrable Securities and, if permitted pursuant to the immediately preceding sentence, other securities requested to be included in such offering exceeds the number of Registrable Securities and other securities, if any, which can be sold therein without adversely affecting the marketability of the offering, the Company will include in such registration prior to the inclusion of any securities which are not Registrable Securities the number of Registrable Securities requested to be included (whether upon exercise of a demand registration right or upon exercise of the right to participate in such a demand registration) that in the opinion of such underwriters can be sold without adversely affecting the marketability of the offering, pro rata among the respective holders thereof on the basis of the number of Registrable Securities requested to be included by each such holder.

(e) Restrictions on Demand Registrations. The Company will not be obligated to effect any Demand Registration, other than a Shelf Registration, within six months after the effective date of a Demand Registration or a registration in which the holders of Registrable Securities were given piggyback rights pursuant to Section 2 and in which there was no significant reduction in the number of Registrable Securities requested to be included. The Company may postpone for up to six months the filing or the effectiveness of a registration statement for a Demand Registration if the Board determines that such Demand Registration or the disclosure required thereby could reasonably be expected to have an adverse effect on (i) any proposal or plan by the Company or any of its subsidiaries to engage in any acquisition of assets (other than in the ordinary course of business) or any merger, consolidation, tender offer or similar transaction, or (ii) any material corporate development; provided that in such event, the

holders of Registrable Securities initially requesting such Demand Registration will be entitled to withdraw such request and, if such request is withdrawn, such Demand Registration will not count as a requested Demand Registration hereunder and the Company will pay all Registration Expenses in connection with such registration.

(f) Selection of Underwriters. The holders of a majority of the Registrable Securities included in any Demand Registration will have the right to select the investment banker(s) and manager(s) to administer the offering, subject to the Company’s approval, which will not be unreasonably withheld.

(g) Other Registration Rights. The Company will not grant to any Persons the right to request the Company to register any equity securities of the Company, or any securities convertible or exchangeable into or exercisable for such securities, without the prior written consent of the holders of at least a majority of the Registrable Securities; provided that the Company may grant rights to other Persons to participate in Piggyback Registrations or Demand Registrations so long as such rights are subordinate to the rights of the holders of Registrable Securities with respect to such Piggyback Registrations or Demand Registrations.

2. Piggyback Registrations.

(a) Right to Piggyback. Whenever the Company proposes to register any of its securities under the Securities Act (including primary registrations on behalf of the Company and secondary registrations on behalf of the holders of its securities other than pursuant to a Demand Registration) and the registration form to be used may be used for the registration of Registrable Securities (a “Piggyback Registration”), the Company will give prompt written notice to all holders of Registrable Securities of its intention to effect such a registration and will include in such registration all Registrable Securities with respect to which the Company has received written requests for inclusion therein within 15 days after the receipt of the Company’s notice. However, the Company shall not include Registrable Securities in a primary registration on behalf of the Company if the Majority Onex Investors so determine.

(b) Piggyback Expenses. The Registration Expenses of the holders of Registrable Securities will be paid by the Company in all Piggyback Registrations.

(c) Priority on Primary Registrations. If a Piggyback Registration is an underwritten primary registration on behalf of the Company, and the managing underwriters advise the Company in writing that in their opinion the number of securities requested to be included in such registration exceeds the number which can be sold in such offering without adversely affecting the marketability of the offering, the Company will include in such registration (i) first, the securities the Company proposes to sell, (ii) second, the Registrable Securities requested to be included in such registration, pro rata among the holders of such Registrable Securities on the basis of the number of shares requested to be included by each such holder, and (iii) third, other securities requested to be included in such registration.

(d) Priority on Secondary Registrations. If a Piggyback Registration is an underwritten secondary registration on behalf of holders of the Company’s securities, and the managing underwriters advise the Company in writing that in their opinion the number of

securities requested to be included in such registration exceeds the number which can be sold in such offering without adversely affecting the marketability of the offering, the Company will include in such registration (i) first, the Registrable Securities requested to be included in such registration, pro rata among the holders of such Registrable Securities on the basis of the number of shares to be included by each such holder, and (ii) second, other securities requested to be included in such registration.

(e) Selection of Underwriters. If any Piggyback Registration is an underwritten offering, the selection of investment banker(s) and manager(s) for the offering must be approved by the holders of a majority of the Registrable Securities included in such Piggyback Registration. Such approval will not be unreasonably withheld.

(f) Other Registrations. If the Company has previously filed a registration statement with respect to Registrable Securities pursuant to Section 1 or pursuant to this Section 2, and if such previous registration has not been withdrawn or abandoned, the Company will not, except as required by Section 1, file or cause to be effected any other registration of any of its equity securities or securities convertible or exchangeable into or exercisable for its equity securities under the Securities Act (except on Form S-8, or Form S-4 or any successor forms), whether on its own behalf or at the request of any holder or holders of such securities, until a period of at least 90 days has elapsed from the effective date of such previous registration.

3. Holdback Agreements.

(a) Each holder of Registrable Securities agrees not to effect any public sale or distribution (including sales pursuant to Rule 144 under the Securities Act) of Registrable Securities of the Company, or any securities convertible into or exchangeable or exercisable for such securities, during the seven days prior to and the 90-day (180-day in the case of the initial Public Offering) period beginning on the effective date of any underwritten Demand Registration or any underwritten Piggyback Registration in which Registrable Securities are included or which is a Public Offering (including the initial Public Offering) for the account of the Company (except as part of such underwritten registration), unless the underwriters managing the Public Offering otherwise agree. In connection with any underwritten Demand Registration, each holder of Registrable Securities will, if so requested by the managing underwriter, enter into customary lock-up agreements for the periods specified in the preceding sentence (or such shorter periods to which the managing underwriter may agree), subject to extension for up to 35 days on customary terms by reason of earnings releases or material news or events concerning the Company.

(b) The Company agrees (i) not to effect any public sale or distribution of its equity securities, or any securities convertible into or exchangeable or exercisable for such securities, during the seven days prior to and during the 90-day period beginning on the effective date of any underwritten Demand Registration or any underwritten Piggyback Registration (except as part of such underwritten registration or pursuant to registrations on Form S-8 or Form S-4 or any successor forms), unless the underwriters managing the registered public offering otherwise agree, and (ii) to cause each holder of its Common Stock, or any securities convertible into or exchangeable or exercisable for Common Stock, purchased from the Company at any time after the date of this Agreement (other than in a registered public offering) to agree not to

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effect any public sale or distribution (including sales pursuant to Rule 144 under the Securities Act) of any Registrable Securities during such period (except as part of such underwritten registration, if otherwise permitted), unless the underwriters managing the registered public offering otherwise agree.

4. Registration Procedures. Whenever the holders of Registrable Securities have requested that any Registrable Securities be registered pursuant to this Agreement, the Company will use commercially reasonable efforts to effect the registration and the sale of such Registrable Securities in accordance with the intended method of disposition thereof, and pursuant thereto the Company will as expeditiously as possible:

(a) prepare and file with the Securities and Exchange Commission a registration statement with respect to such Registrable Securities and use commercially reasonable efforts to cause such registration statement to become effective (provided, that before filing a registration statement or prospectus or any amendments or supplements thereto, the Company will furnish to the counsel selected by the holders of a majority of the Registrable Securities covered by such registration statement copies of all such documents proposed to be filed, which documents will be subject to the review of such counsel);

(b) prepare and file with the Securities and Exchange Commission such amendments and supplements to such registration statement and the prospectus used in connection therewith as may be necessary to keep such registration statement effective for the period required to accomplish the plan of distribution set forth therein (but not, except in the case of a Short Registration, more than six months) and comply with the provisions of the Securities Act with respect to the disposition of all securities covered by such registration statement during such period in accordance with the intended methods of disposition by the sellers thereof set forth in such registration statement;

(c) furnish to each seller of Registrable Securities such number of copies of such registration statement, each amendment and supplement thereto, the prospectus included in such registration statement (including each preliminary prospectus) and such other documents as such seller may reasonably request in order to facilitate the disposition of the Registrable Securities owned by such seller;

(d) use commercially reasonable efforts to register or qualify such Registrable Securities under such other securities or blue sky laws of such jurisdictions as any seller reasonably requests and do any and all other acts and things which may be reasonably necessary or advisable to enable such seller to consummate the disposition in such jurisdictions of the Registrable Securities owned by such seller (provided, that the Company will not be required to (i) qualify generally to do business in any jurisdiction, (ii) subject itself to taxation in any such jurisdiction or (iii) consent to general service of process in any such jurisdiction, in each case where it would not otherwise be required to qualify, subject itself to taxation or consent to general service of process but for this subparagraph);

(e) notify each seller of such Registrable Securities, at any time when a prospectus relating thereto is required to be delivered under the Securities Act, of the happening of any event as a result of which the prospectus included in such registration statement contains

an untrue statement of a material fact or omits any fact necessary to make the statements therein not misleading, and, at the request of any such seller, the Company will promptly prepare a supplement or amendment to such prospectus so that, as thereafter delivered to the purchasers of such Registrable Securities, such prospectus will not contain an untrue statement of a material fact or omit to state any fact necessary to make the statements therein not misleading;

(f) cause all such Registrable Securities to be listed on each securities exchange on which similar securities issued by the Company are then listed and, if not so listed, to be listed, if eligible for such listing, on one or more securities exchanges or the NASD automated quotation system (on the National Market System if the Company so qualifies);

(g) provide a transfer agent and registrar for all such Registrable Securities not later than the effective date of such registration statement;

(h) enter into such customary agreements (including underwriting agreements in customary form) and take all such other actions as the underwriters reasonably request in order to expedite or facilitate the disposition of such Registrable Securities (including, without limitation, effecting a stock split or a combination of shares);

(i) make available for inspection by any seller of Registrable Securities, any underwriter participating in any disposition pursuant to such registration statement and any attorney, accountant or other agent retained by any such seller or underwriter, all financial and other records, pertinent corporate documents and properties of the Company, and cause the Company’s officers, directors, employees and independent accountants to supply all information reasonably requested by any such seller, underwriter, attorney, accountant or agent in connection with such registration statement;

(j) otherwise use commercially reasonable efforts to comply with all applicable rules and regulations of the Securities and Exchange Commission, and make available to its security holders, as soon as reasonably practicable, an earnings statement covering the period of at least twelve months beginning with the first day of the Company’s first full calendar quarter after the effective date of the registration statement, which earnings statement shall satisfy the provisions of Section 11(a) of the Securities Act and Rule 158 thereunder;

(k) in the event of the issuance of any stop order suspending the effectiveness of a registration statement, or of any order suspending or preventing the use of any related prospectus or suspending the qualification of any Common Stock included in such registration statement for sale in any jurisdiction, the Company will use its reasonable best efforts promptly to obtain the withdrawal of such order;

(l) obtain comfort letters, dated (i) the effective date of such registration statement, (ii) the date the Registrable Securities being sold are delivered to the underwriters, if any, for sale pursuant thereto and (iii) if required by the underwriters, if any, on or prior to the date of any preliminary prospectuses, from the Company’s independent public accountants in customary form and covering such matters of the type customarily covered by comfort letters and if the Registrable Securities included in such registration statement constitute at least 10% of

the securities covered by such registration statement, also covering such matters as the holders of a majority of the Registrable Securities being sold reasonably request;

(m) provide a legal opinion of the Company’s outside counsel with respect to the registration statement, each amendment and supplement thereto, the prospectus included therein (including the preliminary prospectus) and such other documents relating thereto in customary form and covering such matters of the type customarily covered by legal opinions of such nature;

(n) if requested by the managing underwriter or underwriters or a holder of Registrable Securities being sold in connection with an underwritten offering (including an underwritten offering under a Shelf Registration), promptly incorporate in a prospectus supplement or post-effective amendment such information as the managing underwriters and the holders of a majority of the Registrable Securities being sold agree should be included therein relating to the plan of distribution with respect to such Registrable Securities, including, without limitation, information with respect to the number of Registrable Securities being sold to such underwriters, the purchase price being paid therefor by such underwriters and with respect to any other terms of the underwritten (or best efforts underwritten) offering of the Registrable Securities to be sold in such offering; and make all required filings of such prospectus supplement or post-effective amendment as soon as notified of the matters to be incorporated in such prospectus supplement or post-effective amendment;

(o) cooperate with the selling holders of Registrable Securities and the managing underwriters, if any, to facilitate the timely preparation and delivery of certificates representing Registrable Securities to be sold and not bearing any restrictive legends; and enable such Registrable Securities to be in such denominations and registered in such names as the managing underwriters may request at least two business days prior to any sale of Registrable Securities to the underwriters;

(p) cooperate with, and make members of management available to participate in, road shows and other marketing activities as reasonably requested by the managing underwriter or underwriters; and

(q) use commercially reasonable efforts to cause the Registrable Securities covered by the applicable registration statement to be registered with or approved by such other governmental agencies or authorities as may be necessary to enable the seller or sellers thereof or the underwriters, if any, to consummate the disposition of such Registrable Securities.

5. Registration Expenses.

(a) All expenses incident to the Company’s performance of or compliance with this Agreement, including without limitation all registration and filing fees, fees and expenses associated with filings required to be made with the NASD (including, if applicable, the fees and expenses of any “qualified independent underwriter” and its counsel as may be required by the rules and regulations of the NASD), fees and expenses of compliance with securities or blue sky laws, printing expenses, messenger and delivery expenses and fees and disbursements of counsel for the Company and all independent certified public accountants,

underwriters (excluding discounts and commissions) and other Persons retained by the Company (all such expenses being herein called “Registration Expenses”), will be borne as provided in this Agreement, except that the Company will, in any event, pay its internal expenses (including, without limitation, all salaries and expenses of its officers and employees performing legal or accounting duties), the expense of any annual audit or quarterly review, the expense of any liability insurance and the expenses and fees for listing the securities to be registered on each securities exchange on which similar securities issued by the Company are then listed or on the NASD automated quotation system (on the National Market System if the Company so qualifies).

(b) In connection with each Demand Registration and each Piggyback Registration, the Company will reimburse the holders of Registrable Securities covered by such registration for the reasonable fees and disbursements of one counsel chosen by the holders of a majority of the Registrable Securities initially requesting such registration (in the case of a Demand Registration) or the holders of a majority of the Registrable Securities included in such registration (in the case of a Piggyback Registration).

(c) To the extent Registration Expenses are not required to be paid by the Company, each holder of securities included in any registration hereunder will pay those Registration Expenses allocable to the registration of such holder’s securities so included, and any Registration Expenses not so allocable will be borne by all sellers of securities included in such registration in proportion to the aggregate selling price of the securities to be so registered.

6. Indemnification.

(a) The Company agrees to indemnify, to the extent permitted by law, each holder of Registrable Securities, its officers and directors and each Person who controls such holder (within the meaning of the Securities Act or the Securities Exchange Act) against all losses, claims, damages, liabilities and expenses (including any amounts paid in any settlement effected with the Company’s consent, which consent shall not be unreasonably withheld) caused by any untrue or alleged untrue statement of material fact contained in any registration statement, prospectus or preliminary prospectus or any amendment thereof or supplement thereto or any omission or alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading or any violation by the Company of any federal, state or common law applicable to the Company and relating to action required of or inaction by the Company in connection with such registration, except insofar as the same are caused by or contained in any information furnished in writing to the Company by such holder expressly for use therein or by such holder’s failure to deliver a copy of the registration statement or prospectus or any amendments or supplements thereto after the Company has furnished such holder with a sufficient number of copies of the same. In connection with an underwritten offering, the Company will indemnify the underwriters, their officers and directors and each Person who controls such underwriters (within the meaning of the Securities Act or the Securities Exchange Act) to the same extent as provided above with respect to the indemnification of the holders of Registrable Securities.

(b) In connection with any registration statement in which a holder of Registrable Securities is participating, each such holder will furnish to the Company in writing

such information relating to such holder and its Registrable Securities as the Company reasonably requests for use in connection with any such registration statement or prospectus and, to the extent permitted by law, will indemnify the Company, its directors and officers and each Person who controls the Company (within the meaning of the Securities Act or the Securities Exchange Act) against any losses, claims, damages, liabilities and expenses resulting from any untrue or alleged untrue statement of material fact contained in the registration statement, prospectus or preliminary prospectus or any amendment thereof or supplement thereto or any omission or alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, but only to the extent that such untrue statement or omission is contained in any information so furnished in writing by such holder which specifically states that it is for use in the preparation of such registration statement, prospectus or preliminary prospectus or any amendment thereof or supplement thereto; provided that the obligation to indemnify will be individual to each holder and will be limited to the net amount of proceeds received by such holder from the sale of Registrable Securities pursuant to such registration statement.

(c) If the indemnification provided for in this Section 6 is unavailable or insufficient to hold harmless an indemnified party under such Section with respect to losses, claims, damages, liabilities and expenses subject to indemnification in accordance with the terms thereof, then each indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of the losses, claims, damages, liabilities and expenses referred to in this Section 6 as subject to indemnification in such proportion as is appropriate to reflect the relative fault of the indemnifying party, on the one hand, and the indemnified party, on the other, in connection with statements or omissions which resulted in such losses, claims, damages, liabilities and expenses, as well as any other relevant equitable considerations, including without limitation the relative benefits received by each party from the offering of the securities covered by such registration statement, the parties’ relative knowledge and access to information concerning the matter with respect to which the claim was asserted and the opportunity to correct and prevent any statement or omission. The relative fault shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of material fact or the omission or alleged omission to state a material fact relates to information supplied by the indemnifying party or the indemnified party and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such untrue statements or omissions. The parties hereto agree that it would not be just and equitable if contributions pursuant to this Section 6(c) were to be determined by pro rata or per capital allocation or by any other method or allocation which does not take account of the equitable considerations referred to in the first sentence of this Section 6(c). The amount paid by an indemnified party as a result of the losses, claims, damages or liabilities referred to in the first sentence of this Section 6(c) shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any action or claim (which shall be limited as provided in Section 6(d) if the indemnifying party has assumed the defense of any such action in accordance with the provisions thereof) which is the subject of this Section 6(c). Promptly after receipt by an indemnified party under this Section 6(c) of notice of the commencement of any action against such party in respect of which a claim for contribution may be made against an indemnifying party under this Section 6(c), such indemnified party shall notify the indemnifying party in writing of the commencement thereof in accordance with Section 6(d). The Company and each holder of Registrable Securities agrees with each other that the amount of such

contribution shall not exceed an amount equal to the net proceeds actually received by such indemnifying party from the sale of Registrable Securities in the offering to which the losses, claims, damages, liabilities and expenses of the indemnified party relates. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any Person who was not guilty of such fraudulent misrepresentation.

(d) Any Person entitled to indemnification hereunder will (i) give prompt written notice to the indemnifying party of any claim with respect to which it seeks indemnification (but any failure to so notify the indemnifying party shall not relieve it of any liability which it may otherwise have to any indemnified party unless such failure shall materially adversely affect the defense of such claim) and (ii) unless in such indemnified party’s reasonable judgment a conflict of interest between such indemnified and indemnifying parties may exist with respect to such claim, permit such indemnifying party to assume the defense of such claim with counsel reasonably satisfactory to the indemnified party. If such defense is assumed, the indemnifying party will not be subject to any liability for any settlement made by the indemnified party without its consent (but such consent will not be unreasonably withheld). An indemnifying party who is not entitled to, or elects not to, assume the defense of a claim will not be obligated to pay the fees and expenses of more than one counsel for all parties indemnified by such indemnifying party with respect to such claim, unless in the reasonable judgment of any indemnified party a conflict of interest may exist between such indemnified party and any other of such indemnified parties with respect to such claim.

(e) The indemnification and contribution provided for under this Agreement will remain in full force and effect regardless of any investigation made by or on behalf of the indemnified party or any officer, director or controlling Person of such indemnified party and will survive the transfer of securities. The indemnification and contribution provided for in this Agreement shall be in addition to, and not in lieu of, the indemnification and contribution provisions in any underwriting or similar agreement.

7. Participation in Registrations.

(a) No Person may participate in any registration hereunder which is underwritten unless such Person (i) agrees to sell such Person’s securities on the basis provided in any underwriting arrangements approved by the Person or Persons entitled hereunder to approve such arrangements (including, without limitation, pursuant to the terms of any over-allotment or “green shoe” option requested by the managing underwriter(s)) and (ii) completes and executes all questionnaires, powers of attorney, indemnities, underwriting agreements and other documents reasonably required under the terms of such underwriting arrangements.

(b) Each Person that is participating in any registration hereunder agrees that, upon receipt of any notice from the Company of the happening of any event of the kind described in Section 4(e), such Person will forthwith discontinue the disposition of its Registrable Securities pursuant to the registration statement until such Person’s receipt of the copies of a supplemented or amended prospectus as contemplated by Section 4(e).

8. Current Public Information. At all times after the Company has effected a Public Offering, the Company will use commercially reasonable efforts to file all reports required to be filed by it under the Securities Act and the Securities Exchange Act and the rules and regulations adopted by the Securities and Exchange Commission thereunder, and will take such further action as any holder or holders of Registrable Securities may reasonably request, all to the extent required to enable such holders to sell Registrable Securities pursuant to Rule 144 adopted by the Securities and Exchange commission under the Securities Act (as such rule may be amended from time to time) or any similar rule or regulation hereafter adopted by the Securities and Exchange Commission.

9. Definitions.

(a) “Common Stock” means the Company’s common stock, par value $0.001 per share.

(b) “Company-Paid Long-Form Registrations” has the meaning set forth in Section 1(b).

(c) “Demand Registrations” has the meaning set forth in Section 1(a).

(d) “Long-Form Registrations” has the meaning set forth in Section 1(a).

(e) “Person” means an individual, a partnership, a joint venture, a corporation, a limited liability company, a trust, an unincorporated organization or a government or any department or agency thereof.

(f) “Piggyback Registrations” has the meaning set forth in Section 2(a).

(g) “Public Offering” means the sale of Common Stock in an underwritten public offering registered under the Securities Act.

(h) “Public Sale” means any sale of the Company’s common stock to the public pursuant to an offering registered under the Securities Act or to the public through a broker, dealer or to a market maker pursuant to the provisions of Rule 144 adopted under the Securities Act.

(i) “Registrable Securities” means (i) any of the Common Stock issued pursuant to the Equity Investment Agreements (including shares of Common Stock issuable upon conversion of any convertible securities issued pursuant to the Equity Investment Agreements), (ii) any of the Common Stock issued or issuable with respect to the securities referred to in clause (i) by way of a stock dividend or stock split or in connection with a combination of shares, recapitalization, merger, consolidation or other reorganization, and (iii) any other shares of Common Stock held by Persons holding securities described in clauses (i) or (ii). As to any particular Registrable Securities, such securities will cease to be Registrable Securities when they have been sold pursuant to a Public Sale. For purposes of this Agreement, a Person will be deemed to be a holder of Registrable Securities whenever such Person has the right to acquire directly or indirectly such Registrable Securities (upon conversion, exchange or exercise in connection with a transfer of securities or otherwise, but disregarding any restrictions or limitations upon the exercise of such right), whether or not such acquisition has actually been effected.

(j) “Registration Expenses” has the meaning set forth in Section 5(a).

(k) “Securities Act” means the Securities Act of 1933, as amended, or any similar federal law then in force.

(l) “Securities and Exchange Commission” includes any governmental body or agency succeeding to the functions thereof.

(m) “Securities Exchange Act” means the Securities Exchange Act of 1934, as amended, or any similar federal law then in force.

(n) “Shelf Registration” has the meaning set forth in Section 1(c).

(o) “Short-Form Registrations” has the meaning set forth in Section 1(a).

(p) “Stockholders Agreement” means the Investor Stockholder Agreement, of even date herewith, entered into by and among the Company and the Investors.

Unless otherwise stated, other capitalized terms contained herein have the meanings set forth in the Stockholders Agreement.

10. Miscellaneous.

(a) No Inconsistent Agreements. The Company will not hereafter enter into any agreement with respect to its securities which is inconsistent with or violates the rights granted to the holders of Registrable Securities in this Agreement.

(b) Remedies. The parties shall be entitled to enforce their rights under this Agreement specifically to recover damages by reason of any breach of any provision of this Agreement and to exercise all other rights existing in their favor. The parties hereto agree and acknowledge that money damages may not be an adequate remedy for any breach of the provisions of this Agreement and that any party may in its sole discretion apply to any court of law or equity of competent jurisdiction for specific performance and/or temporary, preliminary or permanent injunctive relief (without posting a bond or other security) in order to enforce or prevent any violation of the provisions of this Agreement.

(c) Amendments and Waivers. Except as otherwise provided herein, the provisions of this Agreement may be amended or waived only upon the prior written consent of the Company, the Majority Onex Investors and the holders of at least a majority of the Registrable Securities, provided, however, that if an amendment is disproportionately adverse to the interests of Investors other than the Onex Investors on the one hand relative to the Onex Investors on the other hand, such amendment shall require the written consent of the holders of a majority of the Registrable Securities held by Investors other than the Onex Investors. The failure of a party to insist upon strict adherence to any term of this Agreement on any occasion shall not be considered a waiver or deprive that party of the right thereafter to insist upon strict

adherence to that term or any other term of this Agreement. No purported waiver shall be effective unless in writing. The waiver by any party of a breach of any provision of this Agreement shall not operate or be construed as a waiver of any subsequent or other breach.

(d) Successors and Assigns. All covenants and agreements in this Agreement by or on behalf of any of the parties hereto will bind and inure to the benefit of the respective successors and assigns of the parties hereto whether so expressed or not. In addition, whether or not any express assignment has been made, the provisions of this Agreement which are for the benefit of purchasers or holders of Registrable Securities are also for the benefit of, and enforceable by, any subsequent holder of Registrable Securities who agrees to be bound by the provisions of this Agreement.

(e) Severability. If any provision of this Agreement is held invalid or unenforceable by any court of competent jurisdiction, the other provisions of this Agreement will remain in full force and effect. Any provisions of this Agreement held invalid or unenforceable only in part or degree will remain in full force and effect to the extent not held invalid or unenforceable.

(f) Counterparts; Joinder. This Agreement may be executed in counterparts, each of which shall be considered an original, but all of which together shall constitute one and the same instrument. Additional Persons may become parties to this Agreement as “Investors” with the consent of the Company and the Majority Onex Investors, by executing and delivering to the Company a joinder agreement.

(g) Interpretation. In this Agreement, unless a contrary intention appears, (i) the words “herein,” “hereof” and “hereunder” and other words of similar import refer to this Agreement as a whole and not to any particular Section or other subdivision, (ii) the words “include,” “includes” or “including” shall be deemed to be followed by the words “without limitation,” (iii) reference to any Section means such Section hereof, (iv) words of any gender shall be deemed to include each other gender, and (v) words using the singular or plural number shall also include the plural or singular number, respectively. No provision of this Agreement shall be interpreted or construed against any party hereto solely because such party or its legal representative drafted such provision.

(h) Captions. The captions in this Agreement are for convenience of reference only and shall not be given any effect in the interpretation of this Agreement.

(i) Governing Law. This Agreement shall be governed by and construed in accordance with the internal laws of the State of Delaware, without regard to the choice of law provisions thereof.

(j) Jurisdiction. Each party to this Agreement irrevocably submits to the exclusive jurisdiction of the Chancery Court of the State of Delaware and the United States District Court for the District of Delaware in connection with any action, suit or proceeding arising out of or relating to this Agreement, the parties hereto hereby waiving any claim or defense that such forum is not convenient or proper. If for any reason the Chancery Court is deemed to be an inappropriate venue for any such action, suit or proceeding, each party to this

Agreement also submits to the exclusive jurisdiction of the courts of the State for Delaware. The parties hereby irrevocably and unconditionally waive any objection to the laying of venue of any action, suit or proceeding arising out of this Agreement or the transactions contemplated hereby in the courts of the State of Delaware (including the Chancery Court) and the United States District Court from the District of Delaware, and hereby further irrevocably and unconditionally waive and agree not to plead or claim in any such court that any such action, suit or proceeding brought in any such court has been brought in an inconvenient forum.

(k) Waiver of Jury Trial. Each party acknowledges and agrees that any controversy which may arise under this Agreement is likely to involve complicated and difficult issues, and therefore each party hereby irrevocably and unconditionally waives any right such party may have to a trial by jury in respect of any litigation directly or indirectly arising out of or relating to this Agreement, or the breach, termination or validity of this Agreement, or the transactions contemplated hereby. Each party certifies and acknowledges that (a) no representative, agent or attorney of any other party has represented, expressly or otherwise, that such other party would not, in the event of litigation, seek to enforce the foregoing waiver, (b) each such party understands and has considered the implications of this waiver, (c) each such party makes this waiver voluntarily, and (d) each such party has been induced to enter into this Agreement by, among other things, the mutual waivers and certifications in this Section 10(k).

(l) Complete Agreement. This Agreement, the documents expressly referred to herein and other documents of even date herewith embody the complete agreement and understanding among the parties and supersede and preempt any prior understanding, agreements or representations by or among the parties, written or oral, that may be related to the subject matter hereof in any way.

(m) Notices. All notices, consents and other communications required or permitted to be given under or by reason of this Agreement shall be in writing, shall be delivered personally or by e-mail or telecopy as described below or by reputable overnight courier, and shall be deemed given on the date on which such delivery is made. If delivered by e-mail or telecopy, such notices or communications shall be confirmed by a registered or certified letter (return receipt requested), postage prepaid. Such notices, consents and other communications will be sent to the parties at the addresses specified for notices in the Stockholders Agreement or to such other address as the recipient has specified by prior notice to the other parties

IN WITNESS WHEREOF, this Registration Agreement has been duly executed by the parties hereto, all as of the date first above written.

[SIGNATURE PAGE TO REGISTRATION AGREEMENT]

IN WITNESS WHEREOF, this Registration Agreement has been duly executed by the parties hereto, all as of the date first above written.

IN WITNESS WHEREOF, this Registration Agreement has been duly executed by the parties hereto, all as of the date first above written.

IN WITNESS WHEREOF, this Registration Agreement has been duly executed by the undersigned.

Dated: as of 1-25-2007

[SIGNATURE PAGE TO REGISTRATION AGREEMENT]