The TriTac Tactical Pen is the ultimate EDC! The TriTac features a 440c stainless blade, in addition to a tungsten carbide window punch. The TriTac features a heavy duty bolt-action mechanism for the Fisher Space Ink Cartridge, which allows one to write in the most extreme conditions (from wet to outer space! (literally). The TriTac is engineered from aircraft aluminum, and features an ergonomic grip for maximum writing comfort. The TriTac Tactical Pen makes a great addition to your everyday carry!