4 inch Diamond Polishing Pad for Marble Granite Quartz Concrete Polishing | Diamond Polishing Kit: 3 x Grit 50 100, 2 x Grit 200, 1 x Grit 400 800 1500 and 1 Velcro Rubber Backing Pad (5/8 - 11 thread) | 1 Pc Rubber Hook and Loop Backing Pad designed with water hole for wet polishing as well as dry stone polishing | Concrete Tool Kit for dry/wet polisher at MAX RPM - 5000. Never use with High Speed Grinder | Free eBook: Polishing Process Step by Step and Valuable Polishing Techniques