How come Key A can open Lock A. Key B can open Lock B. But not lock A. And key C can open all the locks? Doesn’t that mean A and B should be able to open each other?
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A master key only works on the locks it’s designed to open
When a key is inserted into a lock normally, it raises pins to specific points where they no longer stop it from turning, and most locks have different heights the pins need to be at to unlock making other keys not work
A master key works by each lock having an additional point made on the pins that they can be raised to that also allow it to be rotated, so although they still work individually with their specific keys, a secondary key (the master key) works on them all as well
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