[Feature]: This rotary burr is a spherical wood carving tool that can quickly grind wood slots with a diameter of 40 mm in woodworking projects. [Fine Polishing Processing]: Use the fine polishing processing, acuminate edge and wear resistance, which is especially suitable for finishing. [High Quality]: Wear-resistant grinding ball carbon steel deterrent process can increase wear resistance and has a long service life. The Ball Gouge can handle speeds up to 12000 rpm. [Easy to Use]: Comfortable and convenient operation allows you to easily remove various materials. A rough coating can quickly remove the blank while maintaining a relatively smooth finish. [Two Options]: The 14mm type suitable for 115 and 125 type angle grinder, the 10mm type which is suitable for 100 type angle grinder, you can choose to buy and use. Angle grinder not included. It should only be used on non-metallic materials.