This is a factory replacement gear differential pin for the Schumacher CAT PB 4x4 buggy platform. The metal pin seats inside the gear differential to locate and drive the bevel gears, and is a common wear item that benefits from periodic inspection and replacement. Sold as a set of 2 pins. Features: Metal construction Fits gear differential assembly Pack of 2 pins Direct factory replacement for CAT PB drivetrain 7/7/26 cs