AutoZone, Brandsport, Gorilla Automotive Parts and other auto parts retailers sell lug nut keys for locking lug nuts. Aside from more standard locking lug nuts, Gorilla and McGard sell specialized locking lug nut sets. To replace these keys you need to provide the wheel lock key registration number.
Lug nut locks deter thieves by requiring a specific key to remove the nut. The more unique the type of locking lug nut, the more difficult the key is to replace. McGard makes wheel lock sets with patterned groove locking lug nuts that are very difficult to remove without a matching key. Customers can register their wheel lock key registration number on the McGard website to make replacement possible if the key is lost.