The Japan Racing JN4 lug nuts are premium racing hardware engineered for performance and security, featuring a JN3-style open end design. These precision-crafted lug nuts have a maximum diameter of 20mm and a total length of 45mm, making them specifically recommended for cars with long studs where closed end lug nuts cannot be used. Each complete set contains 20 high-quality lug nuts along with a security key for installation and removal. Perfect for enthusiasts seeking reliable, durable wheel hardware that combines functionality with racing-grade quality for specialized applications.