Traxxas set of hex wheel hubs for the T-Maxx 4WD RTR Monster Truck. These wheel hubs fit on the end of the stub axles. Replaces missing or damaged hex wheel hubs. Hubs are made of molded black plastic. Axle pins are steel. Includes, two 14mm hex wheel hubs and two 2.5x12mm axle pins. Requires: Inserting pins through stub axles and placing wheel hubs in recessed area of axle carriers.