For Metric sizes, ten millimeters is by far the most used (and commonly lost or “borrowed” by co-workers) and, in my opinion, mandatory for a metric wrench set. How We Selected ...

Allen Wrench Sizes. Allen wrenches vary in size, from tiny options for electronics to large ones for machinery and automotive work. Only the exact wrench size can be used on a fastener, ...

L-shaped, long-arm, ball-end wrenches are the most useful type of hex wrenches to have around. The long-arm models have a better reach than what’s typically found on a hex wrench—in some cases ...

Pick the right size Allen wrench for the job. Most sets come with multiple wrenches that are each a different size. Depending on the job, you may need a small or big one.