A Hex Key, Allen Wrench or Allen Key, is a simple tool used to tighten socket screws.
The tool is usually formed of a single piece of hexagon rod of hardened steel, with blunt ends to fit snugly into the screws socket, bent in a “L” shape with unequal arms.
They are available in:
Short Arm
Long Arm
Allen Key sizes available from 0.71mm to 19mm
Some imperial sizes available too.
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