Check the listing for details. Sanding Pad Adapter for Milwaukee M12 Detail Sander 2531-20. Condition: New. Listed at 21.30 USD. For sale is a sanding pad adapter for your Milwaukee Detail Sander that allows you to swap out the default detail sanding pad for other sizes and shapes of sanding pads.It has pre-made holes for common round sanding pad sizes. You can also screw this into a piece of wood or plastic, add some stick-on velcro, and use it as your own custom sanding pad shape. Made of strong but lightweight nylon, which is an expensive material to use but ensures long-term durability and keeps the adapter light enough to not stress the tool and maintain battery life. Note that you may need to do some small modifications to the sanding pad you intend to use - for example, drill a hole through the center to allow you to screw the mounting bolt in. Screw hole dimensions, from hole center to hole center: Triangle Pattern: 1-7/16 inch (~36.5mm)Small Square Pattern: 1-1/8 inch (~28.5mm) from hole to nearest hole, 1-5/8 inch (~41mm) from hole to opposite corner holeLarge Square Pattern: 1-3/8 inch (~35mm) from hole to nearest hole, 2 inch (~51mm) from hole to opposite corner hole