T1A 2 Pack of 3 inch Conditioning Disc Pad Holder Assembly, 1/4'' Shank, Speed-Lok TR Quick-Change attachment, Compatible with 3M ROLOC Scotch-Brite Brand Discs, T1A-ROLOC-3IN 2 Pack of 3 inch diameter holder compatible w/ 3M ROLOC-type discs and pads - OEM/Name Brand Quality - Compare to 3M Brand Heavy-duty rubber pad, aluminum core with nickel-plated removable steel shank 1/4 inch shank fits power drills, die grinders, air grinders and other power tools Accepts sanding, polishing, surface conditioning/preparation, bristle and other disc consumables Rated 20,000 RPM, 1-1/2 inch L shank, overall height 4 inches & Guaranteed to fit Genuine 3M Brand Discs