Free Shipping
Made In USA
KA-BAR TDI
The KA-BAR TDI line exists because of a problem John Benner spent 33 years watching up close. A police lieutenant, SWAT tactical commander, and founder of Ohio's Tactical Defense Institute, Benner knew from experience that fine motor skills collapse under stress while gross motor movements hold — so he designed a fixed blade that draws from the belt like a pistol, using the same instinctive motion officers already train. That angled handle is the signature of every TDI knife KA-BAR builds, and it is why the line has become standard backup equipment for law enforcement, military, and security professionals nationwide.
KA-BAR TDI Law Enforcement Knives
The original TDI Law Enforcement Knife is the pattern that started the line: a compact AUS-8A drop point on that angled full-tang frame, worn support-side as a last-option tool for weapon-retention encounters when an officer cannot access their sidearm. The Large TDI Law Enforcement Knife scales the same geometry up for users who want more blade and more handle, and the TDI Last Ditch Knife compresses the concept to its minimum — a skeletonized backup small enough to disappear on a belt, in a boot, or behind a vest panel. Every fixed blade in the family ships with a hard sheath and belt clip engineered for concealed, secure carry that stays put through active movement.
TDI Folders and Compact Carry
The TDI concept extends beyond fixed blades. The TDI Flipper Folder brings the line into everyday carry with a 3-inch AUS-8A blade, crossbar lock, and fully ambidextrous operation, while the compact Ladyfinger and Astro MP put TDI utility into smaller frames with adjustable carry options. At the top of the range, the TDI Hinderer Hell Fire pairs Benner's design philosophy with Rick Hinderer's, a collaboration between two of the most respected names in hard-use knives.
Designed at Tactical Defense Institute
Every TDI model traces back to Benner's original brief: a knife that works when nothing else is available, drawn with gross motor skills under the worst conditions a professional can face. More than a year of prototyping and in-field testing shaped the first TDI knife, and the same principles carry through the entire line. The design has a documented service record in the field, and it remains one of the most widely carried backup blades in American law enforcement.