Bomwill Tactical Gift Signature Pen/Pens Tungsten Steel Glass Breaker Self Defense with DNA Tactical Edge, Water Resistant, Window Breaker Powerful self defense tool, just as your bodyguard Multi-functions: glass breaker , clip and pen,bright LED, writing instrument Used for self-defense ,emergency aid ,survival ,camping ,tactical ,army ect. Light weight Aircraft Aluminum Tactical Self Defense Pen: 1.63 ounces. Warranty: 365 days warranty and 100% satisfaction service.