Ka-Bar TDI law enforcement knife (4-1480cp-0). 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. Features: – weight: 0.35 lb. – blade type: fixed blade – measurements: – blade length: 2-5/16″ – overall length: 5-5/8″ – edge angles: 15 degrees – shape: drop point – steel: AUS 8A stainless steel – grind: hollow – handle material: Zytel – HRc: 57-59CR – blade thickness: 0.125