This product is a 72mm hardened steel shock shaft designed to restore smooth suspension performance and durability in compatible RC vehicles. It features a precision-ground finish that reduces friction and ensures consistent shock operation under demanding driving conditions. The corrosion-resistant construction helps extend service life during off-road and high-impact use. It is compatible with Traxxas models that use 72mm shock shafts, including X-Maxx 6S and 8S configurations requiring part 8963.