What is a Grandmaster Key?
A grand master key (or GMK) is a key used to open multiple master key systems. This special key is able to open the higher-level master key and all of the change keys beneath it. In the locksmith trade, it’s often referred to as a “GMK”.
Grand master keys are used in a variety of situations. One common use is in commercial buildings, where a single key can be used to open multiple doors. This is especially useful in large buildings, where a single keyholder needs access to many rooms.
Another use of grand master keys is in the automotive industry. When a master key is lost, a grand master key is often used to open the vehicle. This allows the owner to access their car without needing to replace the master key.
Finally, grand master keys are often used in residential homes. A single key can open multiple locks, allowing the homeowner to access any area of their home without needing to carry multiple keys.
Grand master keys are created by locksmiths with special equipment. The locksmith must first create a master key for the system, which will open every lock in the system. Then, the locksmith will create additional change keys that can open specific locks in the system. Finally, the locksmith will create a grand master key that will open all the locks in the system.
Grand master keys can be extremely useful, but they also come with some risks. If a grand master key falls into the wrong hands, it could be used to access any part of the system. For this reason, it’s important to keep grand master keys secure and only give them to trusted individuals.
In summary, a grand master key is a special key used to open multiple master key systems. This key can open the higher-level master key and all of the change keys beneath it. Grand master keys are used in a variety of situations, such as commercial buildings, automotive industry, and residential homes. They are created by locksmiths with special equipment, and should be kept secure to avoid any potential misuse.