Allen wrenches and Hex keys seem very similar to each other. We break down the relationship between the two and some other ...

Allen wrenches, which are also called hex-key wrenches or hex keys, have a hexagonal cross section to fit various machine screws and set screws that have hexagonal-shaped recessed holes.

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 named W.G. Allen, ...

Allen wrenches and accompanying screws were quick, efficient, and reduced slippage. Best of all, the diminutive tool cost only pennies to make—a big reason it’s so pervasive.

This deal on Amazon right now is pretty hard to turn down too, because you can pick up this ELEAD 31-piece Allen wrench set for only $13 if you're a Prime member.. It's a popular one, too, given ...

Mulwark 17-Piece Folding Allen Wrench Set, $16 (was $29) at Amazon Get it! With over 3,400 five-star ratings, this Allen wrench set features 17 different hex metric and hex SAE sizes.

Allen Wrenches, Too. And finally, another important tool to have in your repertoire is a set of Allen wrenches (also known as hex keys). Think of these as the inverse of wrenches and sockets.