Traxxas aluminum caster blocks improve the appearance, ruggedness, and control of your Traxxas model. The billet 6061-T6 aluminum construction adds strength and precision where you want it most. The brilliantly-anodized finish adds vibrant color to your vehicle and features a high-contrast laser etched TRX logo. Traxxas high-performance accessories are made by Traxxas, for Traxxas, so installation is always straight-forward and hassle-free.