Milwaukee 49-36-3455 Backing Pad Kit 4-1/2-Inch
For versatility you can use your Milwaukee Mini Grinder for Sanding operations as well. This lightweight polypropylene backing pad kit converts Milwaukee's      6140-6 to a Sander.  Kit includes a 4-1/2 inch backing pad, a 5/8 - 11 thread disc nut and also includes one each 36 and 60 grit sanding discs.