STADEA Diamond Polishing Pads 5" Dry - Concrete Set of 5 Pieces with Rubber Backer STADEA 5" Diamond Dry polishing pads concrete 5 pieces Pads + 1 Rubber Backer (5/8"11 Threaded) set, 1 piece X Grit (50, 100, 200, 400, 800), Rubber Backer Professional Grade 5" Diameter Dry Diamond Polishing Pads and Rubber Backer for Concrete, Stone, Glass etc polishing 1.2 MM high, velcro backed and extra flexible to polish contoured (Demi, bullnose etc) or straight surfce Designed for Dry Polish, Dry pads Works without Wet Polisher, no watery mess, Optimal RPM 1800 Max RPM 3000 Works great on Concrete, stones, glass etc. Can be used Wet as well