The Black OTF Karambit Knife is a fully automatic, double action pocket knife that comes standard with metal alloy handles with a carbon fiber inlay. The construction of the knife makes for a precision fit and finish not only on the exterior of the knife but also on the inside operating components, as well. The metal alloy is strong, lightweight and luxurious in appearance and feel. The OTF karambit is ergonomically designed to be comfortable in both reverse and forward grip applications, becoming an extension of the operator. Its purpose-built chassis has curves in all the right places. The end of the knife is home to the infamous retention ring, which allows for not only weapon retention under duress but also for advanced flailing and spinning techniques. When the karambit is closed and the blade has not been deployed, it can be used as a less lethal or pain compliance tool. When you purchase a Viper-Tec Knife, you get a manufacturer's lifetime warranty.