Tactical pens are some of our most versatile self defense products. They can get you out of emergency situations with attackers, break glass, or sign the check for your mortgage. Tactical Black Twist Pen with Extra Refill. This pen has a black finished textured aluminum body for easy grip with glass breaker tip and a pocket clip for easy carry. It has a retractable pen tip, twist to open and close. Writes well and comes with a replacement pen ink cartridge. It can be used in a self-defense situation to jab or stab. Pen Measures 6 1/4" x 1/2"