Diamond Polishing Pads 3" inch Wet/Dry Set of 22+1 Backer Pad Best Value Granite Concrete 2 Pieces Final Glaze Buff = 24+1 Pieces FREE SHIP (United States). Usps priority mail. 22 pieces of 3" Pro Grade Wet / Dry Polishing Pad. We recommed wet use. 2 Pieces Real Professional Grade Final Glaze buff bring concrete stone mirror like polished result. 1 Piece of 3" Rubber Pad Holder (5/8"-11 Thread). NOT M14 Thread. Rubber Backer's max capacity is 5000 RPM. Please don;t use it with high speed grinder.