Spyderco, founded by Sal and Gail Glesser in 1976, started in Golden, Colorado, selling the Tri-Angle Sharpmaker™ at fairs. In 1981, they introduced the C01 Worker, a folding knife with a round hole for one-handed opening, a pocket clip, and a serrated edge—revolutionizing folding knives. Now a leader in the cutlery industry, Spyderco operates globally with patents, trademarks, and awards, trusted by knife users worldwide.