If you carry or use a knife daily (or any other bladed tool for that matter) you should get nice and familiar with sharpening stones. These are indispensable tools that are necessary to restore the edge of a knife, or, as stated, any other bladed tool. Axes, knives, chisels, and gouges, among other bladed implements can all be sharpened on stones of appropriate size, shape, and grit. That being...