This is the optional Slipper Clutch Set for the Tamiya XV-01 Chassis. Helps protect the drivetrain from damage from hard acceleration, braking, and jump landings Adjustable to provide high traction on low-grip surfaces Plastic Spur Gear Two Slipper Pads A & B Pressure Plates Slipper Shaft Slipper Spring Two Locknuts 48 pitch pinion gears #54218, #54382 (TAMC4382) or #54383 jxs 11/07/12 ir/jxs &