This Emergency Glass Breaker from Solo Scientific offers a durable, heavy duty design that is perfect for emergency rescue or self defense. It's made from 4.5" of solid stainless steel with a half inch diameter and a sharp striking point. The glass breaker can be used for breaking out of a vehicle in an emergency situation or can double as a steel kubaton for self defense purposes. Item includes a lanyard hole at the base for attaching to a keychain. The Solo Scientific Glass Breaker is a great item for emergency preparedness and self defense.