This Bosch backing pad for the 2 In. Die Grinder is designed for use with the GWG12V-20S 12V Max Die Grinder. The backing pad must be used with type R abrasive discs measuring 2 In. diameter, which are intended for all-purpose material removal. This backing pad is sold with both ¼ In. and 6 mm diameter shafts. To secure this backing pad and a disc to the tool, a ¼ In. or 6 mm shank must be used, matching the size of the collet on the tool.