Self Defense B2 Aerospace Aluminum Heavy Duty Tactical Ballpoint Pen Glass Breaker Multi Tool (Silver) The military aviation aluminum gold material, not only is a writing tool, it is a good tool for self - defense. Can also be used in an emergency to break The window, help to escape. Material: 6061-T6 Aviation Aluminum Provide nice writing tools with high performance and bodyguard for emergency Diamond thread design at the handle, excellent anti-skid ability Effect tactical action, improve safety coefficient Strong attack defense head, control criminals effectively Manganese steel pen holder: Accord with ergonomics design, easy to hook on your backpack, bags, notebook Aviation aluminum material made, durable and practical Smooth business pen, round pen tip, comfortable and stable