An Allen wrench (also called an Allen key) is just a brand name for what is more generally called a hex key. This is an ...

Fit essential Lowe's tools on your keychain for quick access to screwdrivers, openers, and versatile mini-gadgets wherever you go.

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, ...