This is a pack of ten Screws from Ultimate Racing. These are made of 12.9 steel which is the best grade you can use on your RC. The Ultimate Racing Premium Screws are chromed finish which is an efficient protection against corrosion. Most manufacturer brand screws are not grade 12.9 steel. Ultimate Racing Premium Screws are far superior to the screws that come stock with your RC, so these are a great upgrade for your car, truck or helicopter! Never worry about stripped heads or damaged screws again. You will not find a better screw for your RC at this quality-price rate.