Spyderco is a knife company founded by Sal Glesser in the United States. They pioneered the opening hole in the blade of a folding knife. This allows one-hand manual opening of the knife without the need for added thumb-studs or other features.[1] It is headquartered in Golden, Colorado. It was founded in 1978.
A large part of the firm's knife production is outsourced to foreign contractors in countries such as Japan, Taiwan, Italy, and China.[2]
They have pioneered the use of new types of steel alloys and handle materials, also materials such as fiberglass reinforced nylon polymer.