We may receive a commission on purchases made from links. Whether you're assembling a furniture kit or doing maintenance on your bike, you surely know how annoying it can be to work with an Allen key.

If you're like us, you have a toolbox drawer full of loose hex keys that have no rhyme or reason. Over the years, you've collected hex keys from random tool kits at Christmas and just thrown them into ...

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, ...