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A reader says this is the smallest open-end wrench in the world, with 0.005 in. across the flats on one end and 0.010 in. across the other. The human hair next to the wrench gives a comparative size.

We may receive a commission on purchases made from links. No toolbox would be complete without a wrench. When you're completing a basic DIY project that involves tightening bolts or you're tackling ...

The metal in a wrench is all the same. The only difference is if the manufacturer chose to polish some portion of the wrench’s head or handle. Wrenches with black industrial finishes are designed for ...