TDI Law Enforcement Knife, Serrated - In extreme close quarters 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. Weight .18lbs, Blade length 2 5/16th, Overall length 5 – 5/8””, Shape – Drop Point, Stamp KA-BAR, Grind – Hollow, Handle - Zytel