Traxxas 3642X Shoulder Screws (set of 6) Set of six shoulder screws (3x12 hex drive) For Ultra Shocks 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 such as the Traxxas Rustler, consult your user's manual for exact parts listings.