General description Diamond Polishing Disc set includes 15 pieces of 4-inch (100mm) diamond polishing pads designed for effective polishing of various surfaces. The set features a range of grit levels from 50 to 6000, making it suitable for both coarse and fine polishing tasks. These pads are ideal for use on granite, concrete, marble, stone, and tile, providing aggressive and durable performance. Technical specifications Diameter: 4" (100 mm) Height: 3 mm Material: Diamond Powder & Resin Powder Optimal RPM: 2200 Maximum RPM: 12000 Includes: 14 Mixed Grit Wet Polishing Pads (50#, 100#, 200#, 400#, 800#, 1500#, 3000#, 6000#) and 1 Hook and Loop Backing Pad (5/8" Hole x 11 Threads) Usage These polishing pads can be used dry, but the best results are achieved when used with water, enhancing the polishing efficiency and extending the life of the pads.