Masker keys are keys that are designed to open different locks even if they are not keyed the same. Restricted security key blanks of a master key are patent protected disabling other key manufacturers create duplicates of that design.

Apartment owners utilizes master keys to open each and every door of their rented flats, and each occupant possess their own keys for a specific unit as well. That same key may also open the main door into their building or other common areas. However, it cannot be used to open another apartment unlike master keys.

Master key systems also involve grand master and sub master keys. You need master keys systems if you're not into bringing too many keys when opening multiple 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. Our customer support is available 247.