This is the Cressi Sub Killer Stainless Steel FreeDiving Knife for Stoning Game Fish

It Features:

• Total length: 180 mm
• Blade length: 86 mm
• Blade width: 17 mm
• Blade thickness: 3-5 mm
• Weight, knife only: 120 g
• Weight with sheath and straps: 300 g
• Water buoyancy: negative
• Easy to handle
• Forged from a single piece of stainless steel
• Blocked at the grip by a screw knob situated at the end of the grip
• One side of the blade has a smooth cutting edge, the other is partly serrated
• The anatomical technopolymer grip ends at the blade with a thumb tab
• The sheath is made from plastic and has a traditional elastic band to hold on the knife and loops to attach the knife to your leg or onto your belt

One of Cressi's most popular blades, the Killer Stainless Steel Free Diving knife has been around for years and has been a favorite among experts.