An Allen wrench, AKA an Allen key or hex key, is a small hand tool used to fasten ... which is why sets with multiple sizes are so important. In our experience, the longer end is better for ...

Bicycle-specific tool giant, Park Tool sends us their Sliding Hex Wrenches with some great features for review, and they are ...

Pick the right size Allen wrench for the job. Most sets come with multiple wrenches that are each a different size. Depending ...