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 &a