Sunday 3 November 2019

The Allen Key, Allen Wrench or Hex Key (Hexagonal Wrench)

The Allen Key, also known more descriptively as the Hex Key, is used to turn hexagonal screws or drive in hexagonal bolts.

It is an L shape and has a long "arm" which is used to generate torque.

Each key is designed to be used by screws of a specific size, and so the tool is often sold in kits of varying sizes.

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