Spyderco was founded in 1976 by Sal and Gail Glesser. In 1981, the Glessers put down roots in Golden, Colorado and introduced the first Spyderco folding knife. That knife pioneered the concept of a round hole in the blade for one-handed opening, a clip on the handle for carrying at the top of the pocket, and the option of a serrated edge for aggressive cutting performance.