your CNC cutting abilities with the Whiteside CNC Spoilboard Surfacing Router Bit. This 1/4 '' shank bit the surface of your spoilboard, creating a base surface that is rectangular to the router motor. Once you add your evened project material, you are an dead-on cut.This CNC bit can also be used to flatten reverberant edge boards that may be too prodigious to go through your planer.Four wings make a high-speed, washed cut on your project material. This carbide CNC router bit is made in the USA.