The Carbide 3D McFly Cutter 8mm will make light work of any lumber thrown at it. The razor-sharp, indexable carbide tips are perfect for surfacing your wasteboard or finishing up that beautiful end grain cutting board you've been working on. Each bit comes with 4 indexable inserts. This tool is designed for wood only, it is not for use on metals. It is only recommended for Shapeoko machines, not Nomads. Recommended Speeds and Feeds: * Depth per pass: 0.02" * RPM: 16,000 * Feedrate: 60 in/min NOTE: This version of McFly has an 8mm shank and is only compatible with ER16/ER20 spindles with an 8mm collet. If you have a Carbide Compact Router or a 65mm VFD spindle, you will need the McFly with a 1/4" shank.