UZI Defender Tactical Pen w/ Glassbreaker & Cuff KeyMade of lightweight aircraft aluminum Ultra durable, carbide tip glassbreaker Built in cuff key Compatible with standard and Fisher Space Pen refills Pen comes in a black or gun metal finish Used and trusted by the Army, Secret Service, and Special Forces The UZI TACPEN6 BK Defender Tactical Pen is made of heavy duty lightweight aircraft aluminum and features an ultra durable carbide tip glassbreaker and built in cuff key. Screw out the rear end