The TDI/Hinderer knives are design collaborations between Tactical Defense Institute President and Chief Instructor, John Benner, and custom knife maker, Rick Hinderer, owner of Hinderer Knives. Based on their combined experiences as a veteran police Lieutenant and Fire Fighter/EMT, John Benner and Rick Hinderer have designed knives for real-world emergency situations--sure when gripped and ambidextrous for a multitude of mouting and application options. The Hinderance features a modified Tanto blade and a hard plastic locking sheath with metal TDI Belt Clip, Blade length: 3 1/2". Overall length: 7 1/4" Knife made in USA