This Schumacher Racing Products factory replacement FAB drive washer is designed for the Cat PB 4x4 buggy platform. The metal washer features a square center bore that indexes onto the drivetrain, locating it correctly within the slipper clutch assembly. It is a direct replacement for worn or damaged original hardware to restore proper slipper function. Features: Square center bore for positive drivetrain indexing Metal construction Slipper clutch assembly component Factory replacement part for Cat PB platform 7/7/26 cs