Traxxas 1651 Half-Shafts with 2 Internal-Splined, 2 External-Splined and 4 Metal U-Joints Pair of half shafts Includes (internal-splined (2)/external-splined (2))/ metal U-joints (4) Replaces worn or damaged parts Use Traxxas stock and hop-up replacement parts to get the most out of you Traxxas RTR vehicles This product is made from high quality materials and designed for lasting performance This is for use on RC vehicles, consult your user's manual for exact parts listings