A rim lock, sometimes also called rim lock, wheel lock, wheel locking bolt, wheel screw lock or star screw and in English "wheel screw" or "wheel lock", is a special wheel screw or wheel nut that cannot be loosened or tightened with standard hexagonal assembly tools, but only with a suitable special tool, which is called a rim lock key, or key for short.
The keys are usually designed as adapters that fit the profile of the rim lock on one side and have a conventional external hexagon drive on the other side.
Your vehicle could have one of many locking keys. Check picture to ensure correct key, if you're unsure send us a picture and we will be more than happy to match for you.