This is the Hot Racing center one-way differential transfers power to the front differential under acceleration but allows it to "freewheel" while decelerating or braking. Unlike a front one-way differential, a center one-way allows front differential action.
result: you can steer while the brakes are on.

light weight steel shaft
6x10mm one way bearing

One Center One Way Diff with Pre-installed Bearing
One light weight steel shaft
Three M3x5mm Screw
Comment:
One-way mode for racing tight tracks where maximum off-power steering is needed.