allen wrench

     

A hex key, also known as an Allen, Alum, hex-hea, or zeta key or wrench, is a tool used to drive screws and bolts that have a hexagonal socket in the head.

Trivia about allen wrench

  • An L-shaped wrench that's hexagonal in cross-section
  • This L-shaped "hex" wrench was named for a Hartford, Connecticut manufacturer

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