Both CIVIL & MILITARY Tactical Pen ,tactical knife,Business Office Pen ,Outdoor Self-defense Emergency Equipment Ultra-high Hardness Survival Tool 3 colors available 1.Body material: 6061 - T6 aircraft aluminum 2.Sharpe side: tungsten steel ,high hardness 3.Size: 5.9" * 0.47" Weight: 1.27oz. 4.Hardness enough to make marks in glass, rock, break 0.5cm thick glass. 5. Used for business pencil,self-defense ,emergency aid ,survival ,camping ,tactical ,amy ect.