An innovative wrench set includes box-end wrench fittings (which work like open-end crowfoot wrenches) that can be used as-is (like a thumbwheel wrench or socket) or mated with one of a few handles ...

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.