This is the SeaSoft Nite Edge Glow in the Dark Blunt Titanium BC Knife with Double Lock Sheath Features: The lightweight, 3.2 sharp Titanium blade with a serrated blade on the other side with a line cutter and a blunt tip (except the Black Stiletto), the perfect tool for a diver. The patented slider on the sheath that allows you to align the sheath with the two grommet holes on your BC for mounting your NITE-EDGE(TM) easily and quickly with the included screw in pinwheels. The sheath is slotted to allow for the threading of webbing up to 2" wide. The NITE-EDGE(TM) has a great ONE hand quick release and re-connect to the sheath, this is important for so many diving situations. Includes SEASOFT&';s LIFETIME BREAKAGE WARRANTY! The handle absorbs light and GLOWS up to 18 hours to allow you to recover your knife if you are ever separated.