SC TO-T/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE TO

(Amendment No. 4)

TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE
SECURITIES EXCHANGE ACT OF 1934

Hawk Corporation

(Name of Subject Company)

HC Corporation

(Offeror)

a wholly owned subsidiary of

Carlisle Companies Incorporated

(Parent of Offeror)

CLASS A COMMON STOCK, $0.01 PAR VALUE PER SHARE

(Title of Class of Securities)

(including the associated preferred share purchase rights)

420089104

(CUSIP Number of Class of Securities)

Steven J. Ford
Vice President, Chief Financial Officer, and General Counsel
Carlisle Companies Incorporated
13925 Ballantyne Corporate Place
Charlotte, North Carolina 28277
(704) 501-1100

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications

on Behalf of Filing Persons)

Copy to:

Robert A. Rosenbaum
Dorsey & Whitney LLP
50 South Sixth Street,
Suite 1500
Minneapolis, Minnesota 55402
(612) 340-2600

oCheck the box if the filing relates solely to preliminary communications made before the commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which the statement relates:
xthird-party tender offer subject to Rule 14d-1.
oissuer tender offer subject to Rule 13e-4.
ogoing-private transaction subject to Rule 13e-3.
oamendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results of the tender offer.    x

This Amendment No. 4 (“Amendment No. 4”) amends and supplements the Tender Offer Statement on Schedule TO originally filed with the Securities and Exchange Commission on November 1, 2010  (the “Schedule TO”), by (i) HC Corporation, a Delaware corporation (the “Purchaser”), and a wholly owned subsidiary of Carlisle Companies Incorporated, a Delaware corporation (“Parent”), and (ii) Parent. The Schedule TO relates to the offer by the Purchaser to purchase all of the outstanding shares of Class A common stock, par value $0.01 per share (together with the associated preferred share purchase rights, the “Shares”), of Hawk Corporation, a Delaware corporation (“Hawk”), at a purchase price of $50.00 per Share, net to the seller in cash, without interest, less any applicable withholding taxes, upon the terms and subject to the conditions set forth in the Offer to Purchase, dated November 1, 2010 (which, together with any amendments and supplements thereto, collectively constitute the “Offer to Purchase”), and in the related letter of transmittal (as it may be amended or supplemented, the “Letter of Transmittal”, which, together with the Offer to Purchase, constitute the “Offer”).

All capitalized terms used in this Amendment No. 4 without definition have the meanings ascribed to them in the Schedule TO.

All information in the Schedule TO is incorporated into this Amendment No. 4 by reference, except that such information is hereby amended to the extent specifically provided herein.  This Amendment No. 4 is being filed to reflect certain updates as reflected below.

The items of the Schedule TO set forth below, to the extent such items incorporate by reference the information contained in the Offer to Purchase, are hereby amended and supplemented as described below.  All page references in this Amendment No. 4 refer to the Offer to Purchase.

Items 1,4 and 11.  Summary Term Sheet; Terms of the Transaction; and Additional Information

Items 1, 4 and 11 of this Schedule TO are hereby amended and supplemented by adding the following text thereto:

The Offer expired as of 12:00 midnight, New York City time, at the end of the day on Tuesday, November 30, 2010. Based on a preliminary count by the Depositary, a total of 7,321,448 Shares, including 312,450 Shares tendered under guaranteed delivery procedures, representing approximately 94% of all outstanding Shares, were validly tendered and not withdrawn in the Offer.  As of the Expiration Time, Hawk had 7,759,063 outstanding Shares.  All Shares that were validly tendered and not withdrawn have been accepted for payment by the Purchaser in accordance with the terms of the Offer and applicable law.  Purchaser will promptly pay for such Shares at the Offer Price.

The notice of guaranteed delivery period will end at 5:00 p.m., New York City time, on December 3, 2010.

Parent, through the Purchaser, will acquire all of the remaining outstanding Shares by means of the Merger under Delaware law.  In the Merger, each outstanding Share (other than Shares to which the holder has properly exercised appraisal rights) will be converted into the right to receive $50.00 net to the seller in cash, without interest, less any applicable withholding taxes. As a result of the completion of the Merger, Hawk’s Class A common stock will cease trading on the NYSE Amex.  Parent expects that the Merger will be implemented on an expedited basis pursuant to the short form merger procedure available under Delaware law.  As a result of the Merger, Hawk will become a wholly owned subsidiary of Parent.

Item 12. Exhibits

Item 12 of the Schedule TO is hereby amended and supplemented by adding the following exhibit:

Exhibit	Description
(a)(5)(K)	Joint Press Release issued by Carlisle Companies Incorporated and Hawk Corporation, dated December 1, 2010

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SIGNATURE

After due inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

HC Corporation
	By:	/s/ Michael Roberson
		Name:	Michael Roberson
		Title:	Secretary
Dated: December 1, 2010
Carlisle Companies Incorporated
	By:	/s/ Steven J. Ford
		Name:	Steven J. Ford
		Title:	Vice President, Chief Financial Officer,
			and General Counsel
Dated: December 1, 2010

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Exhibit Index

Exhibit	Description
(a)(1)(A)	Offer to Purchase, dated November 1, 2010*
(a)(1)(B)	Form of Letter of Transmittal (including Guidelines for Certification of Taxpayer Identification Number (TIN) on Substitute Form W-9)*
(a)(1)(C)	Form of Notice of Guaranteed Delivery*
(a)(1)(D)	Form of Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees*
(a)(1)(E)	Form of Letter to Clients for use by Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees*
(a)(1)(F)	Form of Summary Advertisement as published in The New York Times on November 1, 2010*
(a)(1)(G)	Form of Notice to Participants in the Hawk Corporation 401(k) Retirement Plan*
(a)(5)(A)	Joint Press Release issued by Carlisle Companies Incorporated and Hawk Corporation, issued October 15, 2010 (incorporated by reference to Exhibit 99.1 to the Current Report on Form 8-K filed by Carlisle Companies Incorporated on October 15, 2010)
(a)(5)(B)	Presentation Materials from Conference Call, dated October 15, 2010 (incorporated by reference to Exhibit 99.2 to the Current Report on Form 8-K filed by Carlisle Companies Incorporated on October 15, 2010)
(a)(5)(C)	Transcript of Conference Call, held October 15, 2010 (incorporated by reference to the Schedule TO-C filed by Carlisle Companies Incorporated on October 15, 2010)
(a)(5)(D)	Presentation Materials from Conference Call, dated October 26, 2010 (incorporated by reference to the Schedule TO-C filed by Carlisle Companies Incorporated on October 28, 2010)
(a)(5)(E)	Transcript of Conference Call, held on October 26, 2010 (incorporated by reference to the Schedule TO-C filed by Carlisle Companies Incorporated on October 28, 2010)
(a)(5)(F)	Complaint filed by Timothy B. Hardy, individually and on behalf of all others similarly situated, on October 25, 2010, in the Court of Chancery of the State of Delaware*
(a)(5)(G)	Complaint filed by Patrick Sweeney, individually and on behalf of all others similarly situated, on October 27, 2010, in the Court of Chancery of the State of Delaware*
(a)(5)(H)	Consolidated Complaint filed by Timothy B. Hardy and Patrick Sweeney, on behalf of themselves and all others similarly situated, on November 9, 2010*
(a)(5)(I)	Joint Press Release issued by Carlisle Companies Incorporated and Hawk Corporation, dated November 23, 2010*
(a)(5)(J)	Memorandum of Understanding, dated November 23, 2010*
(a)(5)(K)	Joint Press Release issued by Carlisle Companies Incorporated and Hawk Corporation, dated December 1, 2010†
(b)(1)	Second Amended and Restated Credit Agreement, dated as of July 12, 2007, among Carlisle Companies Incorporated, Carlisle Management Company, JPMorgan Chase Bank, N.A., as Administrative Agent and the Banks listed therein (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed by Carlisle Companies Incorporated on July 17, 2007)
(d)(1)	Agreement and Plan of Merger, dated as of October 14, 2010, among Carlisle Companies Incorporated, HC Corporation and Hawk Corporation (incorporated by reference to Exhibit 2.1 to the Current Report on Form 8-K filed by Carlisle Companies Incorporated on October 15, 2010)
(d)(2)	Tender and Voting Agreement, dated as of October 14, 2010, among Carlisle Companies Incorporated, HC Corporation and Ronald E. Weinberg (incorporated by reference to Exhibit 2.2 to the Current Report on Form 8-K filed by Carlisle Companies Incorporated on October 15, 2010)

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Exhibit	Description
(d)(3)	Tender and Voting Agreement, dated as of October 14, 2010, among Carlisle Companies Incorporated, HC Corporation and Norman C. Harbert (incorporated by reference to Exhibit 2.3 to the Current Report on Form 8-K filed by Carlisle Companies Incorporated on October 15, 2010)
(d)(4)	Tender and Voting Agreement, dated as of October 14, 2010, by and among Carlisle Companies Incorporated, HC Corporation and Byron S. Krantz (incorporated by reference to Exhibit 2.4 to the Current Report on Form 8-K filed by Carlisle Companies Incorporated on October 15, 2010)
(d)(5)	Confidentiality Agreement, dated as of July 30, 2010, between Carlisle Companies Incorporated and Hawk Corporation*
(d)(6)	Exclusivity Agreement, dated as of October 7, 2010, between Carlisle Companies Incorporated and Hawk Corporation*

*  Previously filed with the Schedule TO.

†  Filed herewith.

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EX-99.(A)(5)(K)

Exhibit (a)(5)(K)

PRESS RELEASE
CSL010022	12/1/10

Carlisle Companies Incorporated Successfully Completes Tender Offer for Hawk Corporation

CHARLOTTE, NORTH CAROLINA, Dec. 1, 2010 — Carlisle Companies Incorporated (NYSE: CSL), and Hawk Corporation (NYSE Amex: HWK), today jointly announced the successful completion of the previously announced tender offer for all of the outstanding shares of Hawk Class A common stock (together with the associated preferred share purchase rights).  The offer expired at 12:00 midnight, New York City time, at the end of the day on November 30, 2010.

On November 1, 2010, HC Corporation, a wholly owned subsidiary of Carlisle, commenced its tender offer to acquire all the outstanding shares of Hawk’s Class A common stock (together with the associated preferred share purchase rights) at a purchase price of $50.00 per share, net to the seller in cash, without interest, less any applicable withholding taxes. Based on a preliminary count by the depositary for the tender offer, a total of 7,321,448 shares of Hawk Class A common stock, including 312,450 shares tendered under guaranteed delivery procedures, representing approximately 94 percent of Hawk’s outstanding common stock, were validly tendered and not withdrawn in the tender offer.  As of the expiration of the tender offer, Hawk had 7,759,063 shares of Class A common stock outstanding.  All shares that were validly tendered and not withdrawn have been accepted for payment by HC Corporation in accordance with the terms of the tender offer and applicable law.

Carlisle, through its direct wholly owned subsidiary, HC Corporation, will acquire all of the remaining outstanding shares of Hawk Class A common stock by means of a merger under Delaware law.  In the merger, each outstanding share of Hawk Class A common stock (other than shares to which the holder has properly exercised appraisal rights) will be converted into the right to receive $50.00 net to the seller in cash, without interest, less any applicable withholding taxes. As a result of the completion of the merger, Hawk’s Class A common stock will cease trading on the NYSE Amex.  Carlisle expects that the merger will be implemented on an expedited basis pursuant to the short form merger procedure available under Delaware law.

Complete terms and conditions of the tender offer are set forth in the tender offer materials, including the offer to purchase and letter of transmittal, filed with the Securities and Exchange Commission by Carlisle and HC Corporation on November 1, 2010, with Carlisle’s tender offer statement on Schedule TO, as amended and supplemented.

About Carlisle Companies Incorporated

Carlisle is a diversified global manufacturing company serving the construction materials, commercial roofing, specialty tire and wheel, power transmission, heavy-duty brake and friction, foodservice, aerospace, and test and measurement industries.

About Hawk Corporation

Hawk is a leading supplier of friction products for brakes, clutches and transmissions used in airplanes, trucks, construction and mining equipment, farm equipment, and recreational and performance automotive vehicles.

IMPORTANT INFORMATION AND WHERE TO FIND IT

This press release is not an offer to purchase or a solicitation of an offer to sell any securities of Hawk Corporation (“Hawk”), nor is it a substitute for the tender offer materials described below and filed by Carlisle Companies Incorporated (“Carlisle”) and Hawk with the Securities and Exchange Commission (the “SEC”) on November 1, 2010, as amended.

Investors and security holders of Hawk are urged to read Carlisle’s offer to purchase filed with the SEC on Schedule TO (as amended, the “Schedule TO”) and Hawk’s solicitation/recommendation statement filed with the SEC on Schedule 14D-9 (as amended, the “Schedule 14D-9”). Hawk stockholders are urged to read these materials carefully as they contain important information, including the terms and conditions of the offer. Hawk stockholders may obtain a free copy of these materials and other documents filed by Carlisle or Hawk with the SEC at the website maintained by the SEC at www.sec.gov. The Schedule TO, including the offer to purchase and related materials, and the Schedule 14D-9, including the solicitation/recommendation statement may also be obtained for free by contacting D.F. King & Co., Inc., the information agent for the tender offer, at (212) 269-5550 or toll-free at (800) 659-5550, or by contacting Carlisle at (704) 501-1100.

Forward-Looking Statements

This press release contains forward-looking statements. These statements are based on current expectations and are subject to uncertainty and changes in circumstances. Actual results may differ materially from these expectations due to changes in global economic, business, competitive, market, regulatory and other factors, including the risk that the transaction may not be consummated; and the risk that Hawk may not be integrated successfully into Carlisle. More detailed information about these factors is contained in filings made by Carlisle and Hawk with the SEC.  Neither Carlisle nor Hawk undertakes any duty to update forward-looking statements.

CONTACT:	Steven J. Ford
	Vice President & Chief Financial Officer
	Carlisle Companies Incorporated
	(704) 501-1100
	http://www.carlisle.com
	Ronald E. Weinberg
	Chairman & Chief Executive Officer
	Hawk Corporation
	(216) 861-3553
	http://www.hawkcorp.com

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