Master Keying

Yes, any key in the master lock system can be duplicated by the locksmith.

Not exactly. By design, the great grand master key should open every lock in the system. Going down the hierarchy, the grand master and master keys are designed to open a set group of doors. Finally, change keys have the narrowest access as they are able to unlock only one lockset.

A grand master key, or great-grand master key depending on the levels within the master key hierarchy, is a key that can open all subsequent keys under it, including master and change keys.

Only authorized employees or staff can request duplicate keys for a master key system when needed. To have a copy made, the locksmith will need a set of codes to identify the system and make a new key that works.

A master key system allows two or more keys to open one lock. It enables a business owner or building manager to use one key for multiple locks. At the same time, it can be used to limit access to some areas for certain employees or occupants. The locks used throughout a building are organized according to a hierarchy, where many keys unlock single doors and one or a few master keys open multiple tiers of doors. At the top of the hierarchy is the grand master key which can be used with any door in the master key system. The purpose of a master key system is to maintain better control over access to areas in the building. For example, users with low-security access may be given a copy of a key that only unlocks one door, while staff or owners of the building would likely have a master key for access to all areas.