Carbon Fiber Knuckle Out The Front OTF KnifeThe knuckle OTF is one of the toughest knives we carry. It is a double action OTF knife with 440 dual tone stainless steel spear point blade. The T6061 Aluminum with Carbon Fiber Inlay knuckle handle includes a pocket clip and glass breaker stub. The glass breaker is a great tool to have for emergency situation where a window may need to be broken. The side of the handle features a slide that you push up to deploy the blade and in the same motion pull