What is a grandmaster key?

What is the difference between a master key and a grand master key?

The fewer people who have high-level access to your company's physical locations, the more secure your master key system can be. A grand master key (GMK) is the next tier down of master level access. It has a higher level of access than master keys but cannot open all the doors a great grand master key can.

What is a master key used for?

A master key is a key that opens several different locks, related in some way, within a master key system. For example, an elementary school may have a master key which will open all classroom doors. Classroom doors would each also be opened by a key which would only open that one classroom door.

What is grandmaster key in hotel?

Grandmaster key/ Emergency key: This key opens all hotel guestrooms and often all housekeeping storage rooms as well even if they are double locked.