Features: This rotary cutter is a spherical wood carving tool that can quickly grind 40mm diameter wooden grooves in woodworking projects.Fine polishing treatment: With fine polishing treatment, the edge is sharp and wear-resistant, especially suitable for finishing.High Quality: Wear-resistant carbon steel deterrent process, increase wear resistance and long service life. Ball Gouge can handle speeds up to 12,000 RPM.Easy to use: Comfortable and convenient operation allows you to easily remove various materials. A rough coating quickly removes material while maintaining a relatively smooth finish.[Two options]: 14mm type is suitable for 115 and 125 type angle grinders, 10mm type is suitable for 100 type angle grinders, you can choose to buy and use. Does not include angle grinder. It can only be used for non-metallic materials.