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