UZI tactical glass breaker pen, ultra durable aircraft aluminum with carbide tip glass breaker and cuff key, gun Metal. The UZI-TACPEN6-GM defender tactical pen is made of heavy duty lightweight aircraft aluminum and features an ultra durable carbide tip glass breaker and built in cuff key. Screw out the rear end glass breaker to reveal the secret hand cuff key, compatible with most professional handcuffs. tried and tested, UZI tactical pens are both stylish and able to withstand a beating. UZI combines advanced technical concepts with innovative designs to produce products used and trusted by the army, secret service and special forces. Since its launch in the 1950s, UZI has become one of the world's most famous firearm brands and a 20th century icon.