How to use: You can use this cupwheel dry or wet, depending on your preference. It can work at speeds up to 10,000 rpm, so you can adjust the speed according to your job. Just attach it to your suitable grinding equipment and start grinding or honing your granite, marble, quartz, or other natural stones. Attention: Make sure the equipment is properly balanced and installed to avoid any safety issues. Do not exceed the maximum speed of 10,000 rpm. Maintenance: After use, clean the cupwheel to remove any debris. Store it in a dry place to prevent damage.