Features and Benefits * Extremely tough three-dimensional web * The Scotch-Brite™ Roloc™ Brake - Hub Cleaning Disc contains no wire filaments; potential for injury from flying wires eliminated for this job - technician safety improved * Removes rust and corrosion without excessive metal removal or gouging of the metal * Helps to maintain AOEM surface milling marks * Cleans area fast while protecting wheel stud threads The Brake Hub (Wheel Bearing Hub) cleaning products are specifically designed to remove rust and corrosion from the various metal surfaces that interface in disc brake applications. Color: Purple.