This kind of grinding wheel is specially used and installed a special-ueed polish machine with high speed、high density and high hardness.It can polish stainless steel、bearing steel etc、special steel's exterior lacuna.It has high grinding proportion and high efficiency.Users can choose the grinding wheels with defferent kinds of granularty、hardness、speed、organizing numbers and mi-xed abrasive scale according to the grinding grade of steel、polish machine's working load ect.characters.