ABRASIVE BUFFING POLISHING WHEEL SET-- Brown: 80 Grit,Green:150 Grit,Red:240 Grit,Black:300 Grit, 4 Colors, 10 pieces for each color, totally 40 pieces Widely used in micro-electronic equipment, jewelry and other industries.which can improve quality of metal stone material, and it is an important part of the machining process. Mainly suitable for removing burrs, rust, dust and removing the oxide layer. SIZE - 1/8 inch (3mm) shank. 7/8 inch diameter, 1/2 inch thickness It is an efficient polishing tool of metal and non-metallic materials in small area of rust deburring and polishing.