Shark 9pt Blunt Ended Dive Knife from Maniago. The blade is made using W1.4028 stainless steel. Hardness is 54-55HRC. Thickness: 2.9 mm - 0.11 inch. Knife Length: 17.5 cm - 6.88 inch. Blade Length: 8 cm - 3.14 inch. Knife Weight: 56 gr. - 1.98 oz. Included accessories: Plastic sheath, black rubber leg straps.