Self Defense B008 Tactical Ballpoint Pen with Ultra-high Hardness Silicon Nitride Glass Breaker Multi Tool (Grey) Made of the military aviation aluminum material, not only a writing tool, but also a good tool for self-defense. Can also be used in an emergency to break the car's window, help you escape. Silicon nitride nib, much higher hardness With rubber on the hat, can protect your hand from hurt in using it. Material: 6061-T6 Aviation Aluminum, 440 stainless steel silicon nitride nib, rubber. Come with gift box