Locksmiths and key makers can make a functional key for a lock without taking it apart by using a process called lock impression. Using this technique, a blank key is inserted into the lock and moved around to imprint the shape of the key. Numerous ancient cultures have left behind evidence of the centuries-long history of lock impression. Lock impression was first used by expert professionals, but it has evolved and is still a useful ability in the locksmithing sector.
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