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 usually utilized by property owners throughout apartment buildings in which there is a master key that can open a door in every apartment, wherein each tenant also have their own keys for their specific unit. This key can also be used to open the building's main entry door including other common areas in the apartment. It cannot be used to open another unit.

Master key system is a complex system that involves 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.

Depending on the needs of the key holder, we can make various master key systems. When in an urgent locksmith emergency trouble, make sure to call our locksmiths at our emergency hotline number. Remember that you can easily reach us by phone 247.