In more complex mechanical lock key systems two different keys one of which is known as the master key serve to open the lock.
Lock and key master.
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If your key is blank it is possible that it is a duplicate key which only a locksmith will be able to help you copy.
Common metals include brass plated brass nickel silver and steel.
It is only possible to obtain a replacement key from master lock if you have the key number.
The key serves as a security token for access to the locked area.
For example this key number is 3900.
Your key number can be found on the back of your key or on the original packaging.
Although these systems often use pin tumbler locks they can use.
Each of these knobs opens with its own key.
Only persons having the correct key can open the lock and gain access.
They are always locked from the outside but doors can be opened from the inside knob.
Unlock these knobs with a master key and a key unique to that door.
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Bases large domestic properties and industry.
To make a master key system you need locks and keys that are the same make and model and a way to rekey those locks.
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Master keyed lock cylinders for cam and deadbolt cabinet.
The basic pin tumbler master locks use a master wafer pin in between the key pin and the driver pin.