To use these Enkei RS05 - RR wheels, first, make sure they are compatible with your vehicle. You can check this by looking at your vehicle's specifications. Once you've confirmed compatibility, you can proceed with the installation. Remember, some modification might be required for a perfect fit. When installing, ensure all bolts are tightened properly to avoid any safety issues. For maintenance, regularly clean the wheels with a mild soap and water solution. Avoid using harsh chemicals as they can damage the matte gunmetal finish. Also, check the wheels periodically for any signs of wear or damage, such as cracks or bends. If you notice any problems, it's best to have them inspected by a professional.