Spencer Frazer, founder of SOG Specialty Knives & Tools, and the U.S. company's chief executive, Fred Keller, have bought back the business from an equity investor, MCC Capital Partners, which stepped into the company in 2009. They have the backing of a new investment group comprising Gladstone Investment Corporation, The Mustang Group and Montlake Capital. Terms of the transaction were not disclosed. Based in Lynwood, Washington, SOG has nothing to do with the Scandinavian Outdoor Group. It takes its name from the Studies and Observations Group, which is described as the predecessor of the U.S. military's Special Operations Forces. The design of its military knife, which was used in the Vietnam War, was adopted by SOG as the basis for the design of its own knives when Frazer founded his company in 1986.