This is a Schumacher Racing Products factory replacement FAB shaft designed for the CAT L1 EVO platform. The metal shaft features a threaded end on one side and a smooth cylindrical body with cross-pin detents, allowing it to transfer drive force within the gearbox assembly. It is a direct drop-in replacement to restore proper drivetrain function when the original component shows wear or damage. Features: Metal construction for drivetrain durability Threaded end for secure installation Cross-pin detents for positive drive engagement Factory replacement part for CAT L1 EVO platform 7/7/26 cs