Set of Four Locking Valve Stem Caps with Matching Key Chain.Dress up your Mustang's wheels with these polished aluminum valve stem caps. Simply remove your stock valve stem caps and replace them with these clean looking polished caps. Also includes a matching polished key chain. Valve stem caps fit any car and features a locking feature. The bottom of the key chain acts as the key to lock and unlock the valve stems. Sold as set of four locking caps with key chain. Great gift idea.