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 ...

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 ...

You could amass an irregular collection of Allen wrenches by saving the ones that come with build-it-yourself furniture, but the way to actually have every hex key you need on hand is to get a nice, ...