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Explore How does a key actually open a lock? #lock #howitworks #engineering #science #amatterofwhy with 1,376 views, 18 likes, and 1 comments. Experience the impact of this video content that has captured audience attention.

How does a key open a door lock? The five bumps on your key are numbers the lock checks all at once. Inside a pin tumbler lock, springs push top pins across the shear line, the seam between the turning plug and the fixed cylinder, so the plug can't turn. The bottom pins have different lengths, and only the right key lifts every gap between the pins to exactly the shear line. A wrong key can get four pins right and still be blocked by the fifth. Follow for more whys. #lock #howitworks #engineering #science #amatterofwhy

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