These faithfull brushes have a nylon for use on wood, metal and stone.It is suitable for wood carving wood furniture polishing.Shank Diameter: 6mmShank Length: 70mmHigh durability, resilient bristles, won't break off, wear well, and reduce the polishing time to improve equipment efficiency.Diameter: 80mm(Approx 3)Grit: 80#,120#,180#,240#,320#,400#,600#Thickness: 30mmMaterial: Nylon yarn, MetalGrinding the hyperboloid and concave- surface fully and uniformly.The 6mm shank enables them to be used with a power tool with a maximum of 4500rpm.1Pcs Abrasive Nylon Wheel BrushProducts with high strength, high melting point, resistance, strong resistance,Long service life.Low water absorption bristles, suitable for wet and dry grinding.Nylon is elastic and internal contains carborundum, it is very convenient to use.