An Allen wrench (also called an Allen key) is just a brand name for what is more generally called a hex key. This is an ...

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 ...

If you've ever bought a piece of flatpack furniture before, you probably have a couple of Allen keys lying around in your toolbox. You've probably also misplaced the tiny tool a couple of times, ...