Large quantity: packaging includes 2 x 50 grit, 2 x 100 grit, 2 x 300 grit, 2 x 500 grit, 2 x 800 grit, 2 x 1500 grit, 2 x 2000 grit, 2 x 3000 grit, and 2 x M16 rubber hooks And ring backing liner, 1 x cleaning cloth, can meet all your requirements. There are sufficient quantities to use and replace. Maximum RPM 5000. Never use it with a high-speed grinder. How to use: The diamond polishing pad set is suitable for portable electric or pneumatic grinders. During operation, when the water is flowing, apply a certain pressure to the machine to go back and forth 4-5 times on the of the stone, and then the grid of the grinding disc can be replaced. Smooth brightness above 90 degrees: The wet diamond polishing pad uses a unique resin binder, which has strong grinding ability, fast grinding speed, high smoothness, high wear resistance and long service life. After grinding and polishing, no scratches and color will be left on the gemstone. The gloss of processed gemstones exceeds 90degree. Wide application range: diamond polishing pad 10.16 cm is used for artificial stone, and marble and other stone processing, tile grinding and polishing, industrial floors, warehouses, parking lots and other concrete floors or curing agent floors. Choose different particle sizes. The grinding disc is used for rough grinding, fine grinding and polishing. [Strong Adhesion] The diamond concrete polishing pad uses high-quality rubber hooks and ring back pads, which can be firmly fixed on the diamond polishing pad, and it will not split during the rotating grinding and polishing process, which is very safe. Colour:As shown Material:rubber Package Contents: 1 set x rock polishing kit Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.