This Tamiya factory replacement shaft set is designed for the BT-01 chassis and includes the front setup spur gear shaft along with its associated small hardware components. The set includes a metal shaft, a coil spring, a roll pin, a rubber gasket, and a plastic collar, providing the key components needed to service or rebuild the front spur gear assembly. It is the correct Tamiya part for restoring proper drivetrain function on BT-01 based vehicles. Features: Includes shaft, spring, roll pin, gasket, and collar Designed for the Tamiya BT-01 chassis Metal shaft construction Factory replacement drivetrain hardware 7/7/26 cs