STADEA 4" Diamond Polishing Pads Grit 50 Wet for Granite Concrete Stone Polishing Resin based Diamond abrasive, 4" Diamond Polishing Pads Wet Grit 50 - 1 Piece Used with Wet Grinders Polishers variable speed/constant speed Used for Granite, Concrete, Marble, stones, tiles polishing Optimal RPM 2200 Max RPM 4500 Also available in Grit 10, 30, 50, 100, 150, 200, 300, 400, 500, 800, 1000, 1500, 3000, 6000, Buff