Built-in locker locks install on locker doors to restrict access to the property inside. They're typically used in schools, gyms, health clubs, and spas so users don't need to keep track of their own locks or keys. Control keys override the combination for combination locker locks and multiuser locker locks, so the locker can be opened if a user forgets the combination. Built-in multiuser locker lock instruction stickers and magnets are placed inside lockers to explain how the locks are used and prevent confusion for users who are unfamiliar with this style of lock.