"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Hex wrenches, also known as Allen keys, are the tools you use to screw and unscrew fasteners that have a ...

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 ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Doug Mahoney Doug Mahoney is a writer covering home-improvement topics, ...

If you’ve assembled IKEA furniture, you’ve used an Allen wrench. These slim, L-shaped contraptions are often the only tool included in the packaging, even when you’ll need others to finish the job.

At first glance the Allen wrench doesn’t seem to be much of a tool. It’s little more than a small, L-shaped piece of metal. But don’t be fooled by its humble appearance, the Allen wrench is an ...

If you’ve worked on a car, a bicycle or basically anything that uses a hex fastener, you’ve grabbed one of these. Well, maybe not one of these, but you’ve reached for a combination wrench. You might ...