This bit helped me figure out that my 3 phase spindle was wired incorrectly. It wouldn't cost a damn thing and I couldn't figure out why. I noticed which way it was going as it turned once and realized it was going the wrong way! All in all, this is a great tool. It is not for nothing that professional workshops use milling cutters with replaceable carbide cutting surfaces. A set of inserts is CHEAP compared to new solid carbide tools and you can reuse an insert by turning it. I LOVE that there is a company that sells this styling tool to hobbyists. Some of the replacement Kenametal and Sandvik end mills in my shop cost as much as my entire hobby machine!