The Recon Medical Gen 3 Mil-Spec Kevlar Metal Windlass Aluminum First Aid Tactical is a compact and lightweight one-handed tourniquet that completely occludes arterial blood flow in an extremity. Using a Self-Adhering Band and a Friction Adapter Buckle to fit a wide range of extremities combined with a one-handed windlass system. Strongly suggest training on tourniquet usage prior to purchasing item.