[HOLLOW CENTER DESIGN]: Safely slides over and around wheel studs, preserving stud threads from damage during operation. [RUST & CORROSION REMOVAL]: Efficiently and quickly eliminates rust, corrosion and debris without excessive material removal or gouging, ensuring wheel integrity. Discs will clean hub and wheel surfaces leaving mating surfaces ready for install. [APPLICATIONS]: Specifically designed for Automotive, SUV, Light Truck, Utility Trailer, UTV, and ATV use, offering quick and effective cleaning of wheel-end mating surfaces. Pads are ideal for hub cleaning and resurfacing. Product name: Wheel hub grinding and rust removal disc Product features: Strong and wear-resistant, uniform grinding effect, no damage to workpieces Product function: paint removal, rust removal, grinding, polishing, cleaning, deburring Scope of application: grinding and rust removal of automobile wheels, chassis, mechanical surfaces, etc. Colour:As Shown Material:Metal Note: Installation guide not included, we strongly recommend you seek professional installation. Please check as much as possible to make sure the item is what you need. Due to different batches, there may be differences in product appearance and printed text, which will not affect use Package Contents: 1 * Brake Hub Cleaning Pad Holder set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.