DISC-LOCK wheel nuts are specifically designed to prevent tires from detaching from commercial vehicles (such as trucks, trailers, buses, etc.) due to nut loosening. DISC-LOCK wheel nuts have been proven to be far superior in safety compared to standard two-piece nuts. When a vehicle turns, brakes, or accelerates, it can cause bolts to gradually loosen, but DISC-LOCK wheel nuts ensure they remain locked, preventing the wheel from separating from the axle. Unlike standard two-piece wheel nuts, DISC-LOCK wheel nuts consist of three parts: (1) the nut, (2) the hexagonal washer, and (3) the washer groove. These three components combine to form a single unit. The wedge design inside the nut ensures that the slope of the contact surface between the nut and the washer is greater than the slope of the bolt thread, creating a wedging effect that maintains strong clamping force, preventing the wheel from detaching from the axle. 1: Prevents tires from detaching from the axle 2: Recognized by most vehicle and axle manufacturers 3: Widely used in the marine industry 4: Installation is as simple as standard two-piece wheel nuts