Pro-Graad 46150 Quick Change Brake Hub Cleaning Pro Discs are engineered for the removal of rust and corrosion from brake hubs. Crafted with silicon carbide mineral embedded in a durable non-woven nylon web, these discs boast conformability, strength, and minimal chunking. Packaged conveniently in a 6-pack of replacement pads, they are tailored and compatible for use with Counteract, Hub Buddy and 3M Hub Cleaning Disc Holders to produce a comprehensive cleaning solution of wheel-end mating surfaces. Specifically targeting rust and debris removal from wheel-end components like hubs, brake drums, and wheel mating faces, these discs excel in thorough cleaning while preserving wheel stud threads. The innovative center hole design enables operators to navigate seamlessly around wheel studs, ensuring cleaning without jeopardizing the threads' integrity. It's essential to note that while these discs comprehensively clean around wheel studs, they aren't intended for cleaning the studs' threads themselves. However, by thoroughly cleaning other surfaces, they contribute significantly to achieving proper torque and clamping force for optimal wheel performance. Compatible with a range of vehicles, including Automotive, SUVs, Light Trucks, Utility Trailers, UTVs, and ATVs, these discs promise effective and efficient maintenance for various applications. NOTE: For best performance, operate at low speeds below 10,000 RPM, and in forward (clockwise) direction only.