Atlas RJ-8000 Air Hydraulic Rolling Center Jack 8,000 lbs. CapacityAtlas RJ 8000 Air Hydraulic Rolling Center Jack 8,000 lbs. Capacity with Truck Adapters The Atlas RJ8000 heavy duty air hydraulic rolling jack has telescoping arms that can be extended over the runways of a four post lift. The lift pads at the end of these arms can be positioned under the lifting points that are located over the runways of that four post lift. This rolling jack is equipped with expandable rail supports which adjust to fit between the