The Metabo 4" x 4" P120 flap wheel (item code: 623480000) is engineered for fine finishing and satin surfacing of metal, compatible with Metabo burnishing machines and expansion rollers. Made from high-quality aluminum oxide abrasive with a fine P120 grit, it is ideal for removing rust, oxide layers, light scratches, and for glazing and grain finishing. Maximum safe speed is 5,800 RPM; recommended working speed is 3,200 RPM, providing controlled, high-quality results for professionals in metal fabrication and maintenance.