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Ancient Egyptian pin tumbler lock is one of earliest forms of locking technology, and its basic design is still used today. This lock used a wooden bolt that slid into a latch to secure a door. It feature was wooden pins of different lengths that blocked bolt from moving unless correct key was used.

The key was a wooden tool with pegs that matched the pins in lock. When inserted, pegs lifted pins to the right height, aligning them with crucial line that allowed bolt to slide and unlock door.