Traxxas Steel Constant Velocity Driveshafts are designed to handle the extreme horsepower and torque that Summit and E-Revo^® (first generation) dish out. The inner and outer U-joints are lubricated and sealed by rubber boots for maximum protection against the elements with lightweight aluminum sleeves to keep the axle pins in place. The nickel plated steel shafts, blue silicone boots, and red-anodized aluminum accents not only look good, they are designed to exacting specifications for ultimate strength and performance. Fits E-Revo (first generation) and Summit.