Lightweight Aluminum 6 in. Tactical Working Pen with Pocket Clip - Charcoal Tactical pen will help keep you safe in danger,a self defense weapon when coming across emergent situations. Versatile Functionality: the black ball point pen writes smoothly;a survival weapon when trapped in the car. YAMISR self defense pen made of aircraft aluminum that is hard enough to be as self defense weapon,Glass breaker tip made of tungsten carbide (used in armor-piercing bullets),which is easily to break the glass. The survival pen is designed with a pocket clip, easy tp clip on your shirt,pant pockets ,backpack, bags and notebook, it's great for your EDC.