Description:* Suitable for pneumatic, electric rotary grinders and electric grinders. It is an good material for abrasive tools and metal surface polishing.* Used for polishing various surfaces such as stone, jade, agate, jade, glass, mold, electronics, glass, equipment, metal and non-metal.* The machine should not be turned at full speed, the recommended speed is 2000-5000R.P.M. Please be sure to use the parameters within the allowable range of sandpaper sticks. Tips:* Do not remove the bottom sealant to prevent the sandpaper from spreading.* The smaller the mesh number, the rougher it is, and the faster the grinding efficiency; the bigger the mesh number, the finer, and the slower the grinding efficiency.