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Ratchet wrenches use a spring-loaded pawl to spin freely

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The satisfying click of a socket wrench is the sound of a tiny metal wedge repeatedly skipping over gear teeth. When you turn it one way, the wedge locks into the gear to apply torque, but pulling it back just lets the wedge bounce uselessly, saving you from lifting the tool.

Ratchet wrenches use a spring-loaded pawl to spin freely
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