Traxxas CVD - 1/16 E-Revo Steel (4) Traxxas Steel Constant Velocity Driveshafts are designed to handle the extreme horsepower and articulation that E-Revo VXL can dish out.The U-joint pins are held captive by a heavy duty o-ring so you never have to worry about losing a pin. The nickel plated steel shafts and black oxide treated accents not only look good, they are designed to exacting specifications for ultimate strength and performance. These are simply the most advanced steel CV driveshafts available for the E-Revo VXL.