... 1) 3'' Resin diamond grinding and polishing pad 2)Thickness:12mm 3)Grit 50,150,300,500,1000,2000, ... 3000 4)Good for stone,marble 3" resin bond floor grinding and polishing ... designed2. Use both wet and dry, wet better3. Grit no. covers 50,150,300,500,1000,2000,30004 ... etc.9, For only floor removal, renovation, grinding, polishing.9. Fit on hand grinders and floor grinder or ...