Features and Benefits: Unique RolocT Attachment System Type H. Roloc disc locks securely; 1/2 turn on 1/2 turn off. Fits over the wheel stud. MT 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.