The Kutotan, designed by marshal arts master Takayuki Kubota is one of the most important self-defense tools ever invented. At just 2oz. this innocuous tool appears to be a harmless key fob. But, even in the hands of an untrained user, it can easily disarm and debilitate an attacker. This Kubotan is expertly designed and manufactured to fit perfectly in the human hand. The ridges give excellent grip. The rounded tip is harmless in your pocket, but with just a bit of force, it can be devastating. Comes with a key ring. Silver. Please check with local laws before ordering.