EZDIVE Corrosion Resistant Hardened TB6 Titanium Knife with Spanner for Hose and Flat Screw Driver 6.3 Inch Scuba Diving Knife Excellent Corrosion Resistant Titanium (Hardened Beta Titanium TB6) With spanners for Hose and flat screwdriver Hook blade design,Overall size : 6.3 inch EZ Sheath design allow divers to take the knife off from the sheath quickly to handle emergency