The MEXCO Ceramica Diamond Dry Polishing Disc is the ultimate dry polishing system for marble, granite, and other natural stones. It is ideal for on-site work and widely used by floor renovators, restorers, and natural stone floor specialists. These premium diamond dry polishing discs should be used on Angle Grinders with speeds between 11000-13000 RPM. This disc has a 50 Grit rating and a diameter of 100mm.