... removing scale, rust, corrosion, weld scale . cup brush,Heavy-duty cleaning of large metal surfaces.weld scale ... to welding.Rust pain removal,cleaning ships,steel tanks ks,Etc.Special Features:Diameter:65mmNut ... and 0.50mmRPM:12,500Steel wire type:brass-plated steel wire,phosphated steel wire,galvanized steel wire and steel cordBowl type:galvanized bowl ... ,100 and 125mm bowl twisted steel wire brush