Impeller is commonly used in portable polishing machines and sanding machines, and is an increasingly popular running sanding disc. The grinding quality is stable and does not burn workpieces, especially for sheet metal of small specifications or stainless steel that needs polishing. These new sand discs are not only strong but also safe. Since there is no back base disk, it can also be directly used on the machine. It is divided into grid page plate, high-strength plastic cover page plate and steel paper page plate, which are widely used in automobile manufacturing, shipbuilding, mold, instrument, instrument, medical equipment and Other Grinding, polishing, trimming and other technological processes. Rust removal, high efficiency of modification and polishing, and can be consistent with various complex surfaces, which are mainly used for manual machine polishing.