If you consider that tools have been employed by humans for longer than recorded history, you’d think that there would have been a great leap in edge preparation technology much earlier in time. But unfortunately, many who designed swords and arrowheads we quite content to shape and hone edges with a sharpening stone. Over the centuries that followed, they taught their stone-sharpening techniques to their apprentices, who in turn taught those same techniques to the ones that followed in their footsteps. In other words: edge preparation has been a laborious act performed manually for what may very well be more centuries than we can imagine. And although most of will agree that stone sharpening gets the job done, it is fortunate that these processes have changed in recent decades. Cutting tool edge preparation, especially for bits and cutters fitted into…