... , and removing scale, rust, corrosion, weld scale . cup brush,Heavy-duty cleaning of large metal surfaces.weld scale and ... 30,0.35 and 0.50mmRPM:12,500Steel wire type:brass-plated steel wire,phosphated steel wire,galvanized steel ... wire and steel cordBowl type:galvanized bowl and painted bowlColors:red and blueUsed for ... 90,100 and 125mm bowl twisted steel wire brush