+A **wrench** is a fundamental [Hand Tool](/wiki/hand_tool) engineered to provide [Grip](/wiki/grip) and mechanical advantage. Its primary function is to apply torque, enabling the tightening or loosening of fasteners like nuts and bolts, a core element of [Mechanics](/wiki/mechanics).
+## See also
+- [Bolt](/wiki/bolt)
+- [Nut](/wiki/nut)
+- [Torque](/wiki/torque)
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