3M 18732 Roloc Bristle Disc Grade - 80 Grit, Size - 2". Disc is a molded, non-woven abrasive filled bristle disc for automotive use on aluminum and metal. Use for deburring, blending, finishing, polishing. Cleaning and for coating, defect, scratch and rust removal. Plastic brush-like bristle disc works with RolocTM system. Removes very little base material from workpiece.Shank Diameter: 5/8". 3M Scotch-Brite ceramic RD-ZB bristle disc is measured using outside diameter (OD), with the OD being 2 in. The quick change attachment allows for easy mounting to the tool or pad. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.