Andux Land Multifuction Aviation Aluminum Self Defense Tactical Pen Glass Breaker Tool 06-ZSB-001 1. The tactical self-defense pen is made of aviation aluminum. 2. Manganese steel pen holder: Accord with ergonomics design, easy to hook on your backpack, bags, notebook. 3. Diamond thread design at the handle, excellent anti-skid ability. 4. Provide nice writing tools with high performance and bodyguard for emergency. 5. Also could be used to break glasses in emergency.