Hex wrenches, also known as Allen keys, are the tools you use to screw and unscrew fasteners that have a hexagonal recess (as opposed to a Phillips or flathead recess). Hex screws are commonly used on ...

Ever wondered why there isn't an Allen key (or hex key, if you prefer) equivalent to the adjustable wrench or spanner? Turns out it's actually quite a complex engineering challenge. But this is 2025, ...

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 ...

Hex keys are often taken for granted because they are used so frequently and for so many jobs on a modern bicycle. In fact, it’s sometimes difficult to find a bolt on a bicycle that doesn’t have a hex ...

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 ...