Altra Industrial Motion 8-K Altra Holdings, Inc. Closes Initial Public Offering

EXHIBIT 99.1

Altra Holdings, Inc. Closes Initial Public Offering

Quincy, MA – December 20, 2006

Altra Holdings, Inc. (NASDAQ: AIMC), parent company of Altra Industrial Motion, Inc., today announced the closing of its initial public offering of its common stock, par value $0.001 per share. In the offering, Altra Holdings sold 3,333,334 shares and certain selling stockholders, including Genstar Captial, Altra Holdings’ largest stockholder, sold an aggregate of 6,666,666 shares. Certain selling stockholders have also granted the underwriters a 30-day option to purchase up to an additional 1,500,000 shares at the initial public offering price to cover over-allotments, if any.

Merrill Lynch & Co. acted as sole bookrunning manager and Jefferies & Company, Robert W. Baird & Co. and Wachovia Capital Markets, LLC acted as co-managers for the offering. The public offering was made by means of a prospectus. A copy of the final prospectus relating to the offering may be obtained from: Merrill Lynch Prospectus Department, Four World Financial Center, 250 Vesey Street, New York, NY 10080; Phone: (212) 449-1000.

This press release shall not constitute an offer to sell nor the solicitation of an offer to buy nor shall there be any sales of the shares in any state in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of such state.

Altra Holdings, through its wholly-owed subsidiary Altra Industrial Motion, Inc., is a global supplier of quality power transmission and motion control products that are sold in a diverse group of industries, including energy, general industrial, material handling, mining, transportation, and turf and garden.

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CONTACT INFORMATION:

David Wall
Chief Financial Officer
Altra Holdings, Inc.
14 Hayward Street
Quincy, Massachusetts 02171
Phone: (617) 689-6380
Email:david.wall@altramotion.com

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