Allen wrenches and Hex keys seem very similar to each other. We break down the relationship between the two and some other ...

Which brings us to the “Sears Craftsman T Handle Ball End Hex Key Allen Wrench Set” (Sears item #00946380000; model #46380). Tool aficionados have their favorite brands for sure. A Snap-On owner ...

Our pick: Amazon Basics Hex Key Allen Wrench Set with Ball End Runner-up: Bondhus 20399 Ball End L-Wrench Double Pack Also great: 12522 Bondhus GorillaGrip Hex Fold-up Double Pack ...

Today, the wrench is referred to as an Allen wrench, an Allen key, or hex key. These tools are available in fractional inch sizes (1/4 inch, for example) and metric (4 mm, for example).