Wrenches are among the most ubiquitous and invaluable hand tools. They fit firmly around nuts and bolts, and their long handles generate a ton of leverage when you need to loosen or tighten fasteners.

If you were asked to list your top 5 most-used tools, we're positive a wrench would be included. Ask a good mechanic which brand wrench is best and he'll swear by one brand or another. However, one ...