Use the Shuttle Dolly Center Rail Ground Support to support Speedrail every 5' when doing a set Upon the ground. Use the optional 3/8"-16 to Female Baby / Male Junior Pin Adapter to mount on your stands with a standard Male Baby Pin (5/8") or a Female Junior Pin Receiver (1-1/8").
Note: Shuttle Dolly Keeper/Grabber Wheels with Brake are not compatible with center rail supports.