The Checkpoint Truck Stud and Hub Cleaning Tool fromMartins Industries is designed to quickly remove rust, corrosion, and dirt from medium and heavy trucks' rotors, drum brakes, hubs, and studs. It's meant to help ensure the secure fitment of wheels and wheel nuts to minimize the risk of a wheel detachment. It also prevents the hub from running off center leading to vibrations, accelerated wear and tear on bearings and other components. Additionally, its abrasive pads can clean up to 300 truck hubs and is compatible with 1/2" impact wrench.