Material: Made of high-quality chromium-molybdenum steel, which has higher strength and toughness than ordinary steel. It is strong, corrosion-resistant and not easy to break. It can withstand high torque and pressure. Application: 17mm/19mm/21mm Impact Wheel Protector Nut Socket Kit is suitable for car repair, engine maintenance, tire replacement, especially convenient for home repair and assembly tasks. 6-point design: High torque, 6-point opening can tightly clamp the flat surface of the fastener instead of the corner, preventing any rounded corners, preventing the bolt from falling off, and the protection work is completed Clear Dimensions: Each is laser-etched with its dimensions for quick and easy identification, so you can find the right outlet for the job in no time Easy to carry: Thin-wall deep sockets come in a sturdy, high-strength storage box to keep your sockets organized and accessible for convenient storage and use Protect your wheels and prevent costly damage with the Wheel Protector Damage-Free Lug Nut Sleeve Kit. The kit is crafted with precision and durability in mind, with accessories made from high-quality carbon fiber that is not only visually appealing but also extremely strong and lightweight. Whether you're custom building or simply upgrading an existing system, these accessories will enhance the overall aesthetic while ensuring reliable performance.