For versatility you can use your Milwaukee 13 and 15 Amp 6,000 RPM Grinders for Sanding operations as well. This lightweight polypropylene backing pad kit converts Milwaukee's 6078, 6066-6, 6068-66096, 6080-20, 6081-20 and 6088-20 Grinders to Sanders. The kit includes a 7 inch backing pad, a 5/8-11 thread disc nut. Does not include sanding disc. Order separately.