In extreme close-quarter encounters where a suspect is attempting to take an officer's handgun, or an officer cannot access his or her 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. Features a fully serrated blade for cutting looped and synthetic materials. Hard plastic sheath and reversible black metal belt clip included.