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This Pro-Tech TR-4 offers a great multi-purpose 4" CPM-D2 blade with DLC black coating and has a plain edge. The black handle features a smooth finish and has a 2-ton skull crusher. The knife also features all-black hardware and this model has a built-in 416 hardened stainless steel glass breaker at the butt end and of course, the coil spring action that Pro-Tech is famous for.
Originally designed to fulfill a specific US military requirement this TR-4 knife has proven to be the perfect choice of knife for anyone who is looking for a full-sized automatic folder. This knife is also great for everyday carry.
