: if all door locks are different and different keys open different locks, how does a universal key work?
In: Engineering
This is a question that’s really hard to explain and understand without a visual aid
Here’s a link to a gif that shows how it works
http://ichiya.com/Lock/images/fig/pinCylinderAniFull.gif
Notice how those pins have multiple spots where they can line up. A master key moves the pins into the other position where the whole thing can turn
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