Features:_x000D_ _x000D_ Made of high quality material, wear resistance, long service time. _x000D_ High grinding efficiency, smooth, unbroken edges, will not produce tremor. _x000D_ With the use of grinding machine, efficient and fast. _x000D_ Good polishing effect, easy to deal with various rough surface. _x000D_ Suitable for grinding various stone such as marble, granite, ceramics, concrete and other processing and polishing. _x000D_ _x000D_ Specification:_x000D_ Material: Diamond_x000D_ Weight: 210g/7.4oz_x000D_ Shape: round_x000D_ Maximum linear speed: 80rmp_x000D_ Outer diameter: 100mm/3.9inch_x000D_ Inner diameter: 20/22mm_x000D_ _x000D_ Package List:_x000D_ 1* Diamond Grinding Wheel 1Made of high quality material, wear resistance, long service time. 2High grinding efficiency, smooth, unbroken edges, will not produce tremor. 3With the use of grinding machine, efficient and fast. 4Good polishing effect, easy to deal with various rough surface. 5Suitable for grinding various stone such as marble, granite, ceramics, concrete and other processing and polishing.