The Innovative Scuba Concept Fold-Up Floating Rescue Knife is a unique knife that has a serrated stainless steel 2 8" (7cm) long blade with a 0 5" (1.2cm) thickness. This knives handle length is 4 5" (11.5cm), so it will fit nicely into a BCD pocket and ready when needed. The knife measures 7 1" (18cm) when open. The low-profile plastic handle is 0 9" (2.2cm) thick and is equipped with an eyelet for attachment of a lanyard. Knife weighs 1.5 oz. (43 g) and floats if dropped in water.