This is a pack of ten screws from Ultimate Racing. These screws are made from 12.9 steel, which is the highest quality that can be used for your RC. The Ultimate Racing Premium screws feature chrome plating that provides effective protection against corrosion. Most manufacturer's screws are not 12.9 steel. The Ultimate Racing Premium screws are far superior to the screws included in your RC's original packaging, making them an excellent upgrade for your car, truck, or helicopter! You will never have to worry about damaged or worn screws again.