Tungsten is 1.7 times denser than lead and offers more control over precise weight distribution. Place more weight in a smaller, precise area. Fine-tune your car's Center of Gravity (CoG) and optimize performance and stability. Includes four 1/2 oz screw-in Tungsten CoG Weights. Use individually or as 2 to 4-unit sets. Screw-in and adjust with an Allen wrench.