Set of four bolts that can be used to secure the wheels against theft. If one of the standard bolts is replaced with this safety bolt, the wheel cannot be taken off without special adapter. The adapter is supplied with the bolts and can be bought separately if lost. To choose the right one, we recommend to note the number code on the bolts. These bolts can be used on all types of manufacturer-approved wheels, either steel or light alloy ones. Non-original bolts may be too short or too long, thus causing damage to various parts of the wheels.