Sport Type: Diving This is a compact knife for divers. It attaches upside down to the BC's corrugated hose with the included short strap. Total Length: Approximately 180mm Blade: Approximately 75mm (Titanium) Manufacturer's suggested retail price is 13,200 yen. I brought it into the ocean about 150 times. After each use, I rinsed it with fresh water and stored it in a closet. There are some scratches near the tip of the blade. It's made of rust-resistant material, and in fact, no rust has occurred. You don't have to worry about rust, so you can equip it with ease. Please consider this item only if you understand that it is a used product.