Master keys open all rooms in a building. Grand Master keys open all rooms in several buildings.
Just like any other key ... except that a master key will open more than one lock.
If you are asking if there is a master key, no.
A master key is an original operating key and operates all locks on a vehicle. Sometimes there are two keys, a master and a valet. The valet key is used when you drop off a car for someone else to park. A valet key will not open a trunk or glove box.
Lock cylinders can be designed in a series so that one "master" key will open them all, but their individual keys will not open each other. Some manufacturers release sets of master keys to locksmiths, that can be tried on locks in the hope that one will fit. There is no single master key that will open all locks of a given make.
its open all locks in any particular ornaisaton.
You do not need a key to open the vault. All you need to do is go to the blinking box next to the door and it will say to press a button to activate it. When you press the button then you will hear a siren and it will open the door.
The Valet key will not open the glove box or trunk. The master key opens everything. It usually has a red mark on the black fob
The red square (sometimes a dot) on your key means that it is a master key. It will open every lock on your car. If the key has no red square or a black square then it is a secondary key that will open the doors, the boot and the ignition but will not open the storage compartments such as the glove box.
Lock smith! They can either open the door or make you a duplicate key (no master key needed).
Open the trunk with the master key.
it all depens on the make of the car but most of the time it dose