Package: 1pc Diamond Flat Grinding Wheel 6"x1" <br><br>Grit: 240 <br>Recommend RPM is 1450.<br> <br>When you want to grinding /cutting special hard items, such as gem or glass, the normal Silicon Carbide Grinding Wheel is not stiff enough to do this work, now our Diamond Flat Grinding Wheel can help you. <br><br>◆What items it can be used to grinding? <br>→It can be used to grinding gem stones, granite, marble, glass, wolfram steel, hard alloy, ceramic, etc. Great for lapidary cabbing and contour grinding. <br><br>◆Does it stiff enough and how’s the grinding effect? <br>→This 6 inch Diamond Flat Grinding Wheel is made of the high quality diamonds is super stiff for clean and faster grinding/cutting, last for extremely longer grinding life. <br><br>◆Any other feature? <br>→The plastic hubs are lighter and can be used on less powerful grinding machines. <br><br>◆Any other further questions please don’t hesitate to contact us :)