We may receive a commission on purchases made from links. The Allen wrench, also known as a hex key, is a L-shaped hand tool with hexagonal (six-sided) ends. It all started with a Connecticut inventor ...

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Because of its small size, high torque strength, and recessed installation, the hex socket screw is a great alternative to regular bolts. The main tool used to tighten or loosen hex socket screws is ...

From type to tolerances, our guide to the often overlooked tool Excluding your mind, hands and perhaps bottle opener, nothing in the bicycle workshop is likely to get more use than Allen keys (AKA hex ...