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Allen wrench
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Allen wrench

tool
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Quick Summary

An Allen wrench is a tool, specifically an L-shaped hexagonal metal bar, used for turning screws or bolts with a hexagonal recess. It is a type of wrench, which is a tool designed for tightening or loosening nuts and bolts. The Allen wrench's hexagonal shape allows it to fit snugly into the corresponding recess, providing good grip and leverage. The tool is named after the Allen Manufacturing Company.12

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