The company, originally called Fastener Corporation, was founded in 1937 by the late Henry A. Torstenson. It started out as a small manufacturer of hand-held staplers and related fasteners on the north side of Chicago. Products were sold under the Duo-Fast brand name. The company grew rapidly during World War II when it was awarded substantial government contracts for Duo-Fast staples, hand tackers and hammer tackers. The market's acceptance of automatic stapling products quickly increased within various industrial markets. After the war, the company further established itself in the industrial staple industry by expanding its product line to meet the needs of new applications, particularly those in the furniture and woodworking industries.

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