4" Dry Polishing Pads Set of 7 PCS - DAMO Diamond Tools ... diamond polishing pads, diamond hand profiler, diamond router bits, diamond core bits, diamond saw blades (1) DAMO dry pads are used for dry polishing of soft stones such as marble, or light color stones. (2) Ware an apron, a gauze mask and safety glasses first. Connect a Back Holder to the Polisher, and attach a Damo Dry Pad of grit 50 to the Back Holder. Set the speed at 3,000-4,000RPM and start polishing process.