The Boker MPP Tactical Pen serves primarily as a high-quality writing instrument, but can also save lives in extreme cases. In emergency situations, the glass breaker can help to free injured persons from cars or the stable body can be used for Kubatan techniques. The body is constructed with wide grooves and is made of lightweight aluminium that is very comfortable to hold. The stable clip keeps the MPP always ready to hand. It is compatible with Fisher Space-Pen refills #Pr4, to change the refills it is screwed apart by left-hand thread. This prevents unintentional disassembly when unscrewing the cap. FeaturesSlim aluminum handleCompatible with Fisher Space-Pen refills1.38 oz weight, 5.91 in length and .54 inch diameter