The CAT (Combat Application Tourniquet) is a small and lightweight arterial tourniquet that completely occludes blood flow in an extremity. Used for the treatment of life-threatening bleeding, the CAT Tourniquet uses a Self-Adhering Band and a Friction Adaptor Buckle to fit a wide range of extremities combined with a one-handed windlass system. The windlass uses a free moving internal band to provide true circumferential pressure to an extremity. The windlass is then locked in place; this requires only one hand, with the Windlass Clip. The CAT Tourniquet also has a Hook-and-Loop Windlass Strap for further securing of the windlass during patient transport.