Traxxas 7151X 1/16 Scale Steel Constant-Velocity Driveshafts Traxxas Steel Constant Velocity Driveshaft's are designed to handle the extreme horsepower and articulation U-joint pins are held captive by a heavy duty O-ring so you never have to worry about losing a pin Nickel plated steel shafts and black oxide treated accent for the ultimate in strength and performance Comes with four preassembled shafts U-joint pins are held captive Nickel plated steel shafts Simply the most advanced steel CV driveshafts available for the E-Revo VXL