Features and Benefits * Unique Roloc Attachment System, Type H. Roloc disc locks securely; 1/2 turn on, 1/2 turn off. Fits over the wheel stud. * M Disc Holder is designed to fit on a variety of tools with collets or chucks * Ideal for use on right angle air tools * Attachment button and holder are made of tough polymers that will not damage the wheel stud threads * Maximum operating speed: 20,000 rpm 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.