A master key system is where door locks are designed not only to be opened by their individual keys, but also by a "master" key that opens some, or all other locks in the system.
These systems can be simple, usually suitable for guest houses and small businesses or more complex, to include common entrances, sub-master and grand-master keys.
Master key systems are not to be confused with keyed alike systems,where more than one lock works on the same key.
We do all our master keying in house and can create computer generated master key systems to suit your individual requirements.