Spyderco has produced a number of amazing innovations including one-hand opening knives, spyderedge serrations on their blades, and the whole idea of a clip on a knife. They make a variety of high quality automatic knives. Spyderco Automatic knives, including the Citadel, are some of the best built automatic knives in world. They also produce amazing butterfly knives. Spyderco butterfly knives are a wonder to use. Spyderco knives are high quality and reliable cutting tools that are designed and manufactured for top performance and for ergonomic comfort. Find a Spyderco knife you like and try one out today!