Tamiya OP-2071 BB-01 Slipper Clutch Set 22071 *With assembly instructions [Parts useful for improving the performance and setting of RC cars] Uses slipper pads to protect gears from large inputs common in off-road driving, such as landings after jumps. Furthermore, by adjusting the spring tension with the lock nut, the slip timing can be changed, improving running stability on low-grip surfaces. [Basic Specifications] Includes a 20T gear integrated main shaft, 86T spur gear, slipper screw, pressure plate, slipper pad, 1050 bearing, 2.6mm lock nut, etc. *Photo 3: Contents, Photo 4: Example of installation, Photo 5: Assembly example