In extreme close-quarter encounters where a suspect is attempting to take an officer's handgun, or an officer cannot access his handgun, the TDI knife is available as a "last option" knife. When worn on the pant belt the entire unit - knife and sheath - is well concealed. Designed by John Benner, founder and owner of Tactical Defense Institute. It has a drop point blade that is hollow ground to a 15 degree angle. The non-reflective black blade has a Rockwell hardness of 57-59CR. Coyote brown color handle. Includes black metal belt clip. Includes glass filled nylon sheath.