My best friend just made a copy of our apartment key. She was pretty sure the machine messed up because the key was cut very different from the original. To her surprise, it still opened our front door. How is this possible?
Assuming it may have something to do with the height or order of how the pins in the lock open/fall?
In: Other
The lock only checks how tall the key is at certain points. With any given lock usually having between 4 and 10 pins that each check that the key is the right height at just that point. The key lifts each pin so that the pins shear-line is in line with the cylinder, which makes the cylinder able to rotate.
On top of that the system can be masterkeyed. This means that each pin is split into two. Lift it up to a certain height with the regular key and the cylinder is in line with one shear-line. Lift it up to a different height (with the master key) and it’s in line with a different shearline.
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