The Allen wrench, also known as a hex key, is a L-shaped hand tool with hexagonal (six-sided) ends. It all started with a Connecticut inventor named W.G. Allen, ...

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, unlike ...

This deal on Amazon right now is pretty hard to turn down too, because you can pick up this ELEAD 31-piece Allen wrench set for only $13 if you're a Prime member.. It's a popular one, too, given ...