Sminiker Defender Tactical Pen Aircraft Aluminum Self Defense Pen with Glass Breaker Writing Multifunctional Survial Tool (Gold) Heavy-duty Tactical Pen, made of Aircraft Aluminum, effect tactical action, improve safety coefficient. Lightweight and Portable. Features an Ultra durable carbide tip Glass Breaker, could be used to break glass in emergency. Provide Nice Writing tools with high performance, accord with ergonomics design, easy to hook on your backpack, bags, notebook. Diamond Thread Design at the handle, excellent anti-skid ability. Compatible with Standard Refills.