Yeah Racing 4mm Aluminum Serrated Wheel Lock Nut is a pack of four high-quality wheel nuts made from lightweight aluminum alloy material. These nuts are designed with a flanged design and a knurled serration backing for maximum locking security. They are anodized with a stylish finish and are available in different colors including black, blue, orange, and silver. These wheel nuts are perfect for enhancing the look and performance of your RC car.