diamond polishing is a revolutionary cleaning system consisting of floor pads containing billions of microscopic diamonds which clean and polish the floor mechanically instead of using chemicals. Diamond polishing can be used on most common floor surfaces such as terrazzo, natural stone, concrete, vinyl, and epoxy. Diamond polishing transforms dull, worn floors into clean, glossy, and brightly polished floors. A convenience pack that includes one each of 400 grit red heavy duty cleaning, 800 grit white deep cleaning, 1500 grit yellow polishing and 3000 grit green polishing/daily maintenance diamond pads four pads total. Sold 2 pads per case.