The ultimate dry polishing system for marble, granite and other natural stones, ideal for working on site, 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 kit includes 100mm polishing discs ranging from 50 – 3000 grit grade, with an M14 fitment backing pad.