Power & Free conveyor system; It offers maximum flexibility for demanding material flow tasks, light and heavy goods for different transport tasks in production and logistics. The transported products can switch between chain circuits via the road trusses within the Power & Free conveyor system. In this way, the conveyor currents can be separated or reassembled as required. The stoppers separate the trolleys from the conveyor chain and create buffer areas for the material storage, pick-up and drop-out points or process points.