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Allen wrench

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noun Al·len wrench \ˈa-lən-\

Simple Definition of Allen wrench

  • : a small tool that is used to turn a special type of screw

Source: Merriam-Webster's Learner's Dictionary

Full Definition of Allen wrench

  1. :  an L-shaped hexagonal metal bar either end of which fits the socket of a screw or bolt

Origin of allen wrench

Allen Manufacturing Co., Hartford, Connecticut


First Known Use: 1943


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