There could be grand master keys prefaced with great great great great, etc. Theoretically, this trend can continue until the locks become too complicated to function. In the trade, a master key may be shortened to ‘GMK’.Īnd so on and so on…. This key will open every master system under it, and the subsequent change keys under those systems. Grand Master Key – A grand master key is used to access multiple master key systems. In the trade, a master key may be shortened to ‘MK’. In some systems, this will be the highest ranking key. This is the necessary key to change a simple lock into a master keyed lock. Master Key – Without a master key, there is only one key for a lock. The lock that the change key opens will also open with the use of the master key, and any key above that rank. It will open one lock and only locks that are exactly the same. There May Be Several Keys in a Master SystemĬhange Key – This key is also referred to as a sub-master key. Here, we explain how master key systems and key management operations work together to achieve these goals. In this article Ken Lozinski, owner of Shearline Locks in Saskatoon shares how you can ensure access for employees with different levels of authorization whilst also maintaining a high level of security for your commercial facility.

Though an increasing number of companies and multi family buildings are upgrading to electronic access control systems, many facilities still rely on traditional keys. Interested In Learning More About A Master Key System?

Master key for master locks