The TDI Law Enforcement Knife was designed by John Benner, founder of the Tactical Defense Institute. The TDI Law Enforcement Knife was designed to be used as a "last option" knife. In extreme close quarters encounters where a suspect is attempting to take an officer's handgun, or the officer cannot access the handgun, the TDI Knife is available. Designed as an "off hand" knife that can draws like a pistol, the reversible sheath can be worn on either the right or left side of the officer's pant belt. Comes with hard sheath and TPI clip.