Master key or master keying is the capability to use one "Master" key to open one or more locks that are not actually keyed the same. Restricted security key blanks of a master key are patent protected disabling other key manufacturers create duplicates of that design.

Master keys are also used by landlords or landladies in apartment complexes where they have a master key that could open a door in each flat, and at the same time, each occupant also possess a key to their own unit. Other common areas in the apartment can also be opened using this key including the main door of the entire building. Unlike Master keys, a tenant's specific key will not work on the lock of a different apartment unit.

Complex master key systems involve multiple master, grand master and sub master keys. You need a master key if you do not want to keep a lot of keys for a lot of doors.

We can make the proper master key systems depending on your key holder. All you need to do is to dial our number and our accommodating phone staff are more than happy to assist you. Call us anytime you need us, we are available 24 hours a day, 7 days a week.