Wheel locks are a great way to help protect your expensive alloy wheels. Factory alloy wheels can cost several hundred dollars each and some more than a thousand dollars each.
Wheel locks are used in place of the wheel lug nuts. Usually one lug nut on each wheel is replaced with a wheel lock that can only be removed with a special key.
They often have a smooth outside surface that a wrench cannot grip onto. In the center they have a special design that only the key with that same special design can fit into. Some other wheel locks can use irregular shaped outer splines or uniquely shaped internal sockets.
To install and remove the locks you must use the key that fits into a regular socket or lug nut wrench.