200 grit – Heavy duty cleaning. Most aggressive. Removes scratches and stains ZOOM Diamond Impregnated Pads are the CHEMICAL-FREE solution for care and maintenance of natural stone and terrazzo. Just add water. Simply use these pads with water and avoid all the risk of chemicals and inexperience. Stone Pro ZOOM Pads are designed for cleaning, light restoration and maintenance. Each pad has millions of micro-diamonds infused to the surface. The result is quicker and easier polishing with no need for additional chemicals to get a great result. These diamond floor pad can be used on marble, travertine, limestone, terrazzo and polished concrete. ZOOM Pads come in a variety of grits and sizes to fit the most popular machines and take on jobs for light maintenance to heavy duty cleaning and repair.