The Yakima EXO System consists of a group of modular components that can be mixed and matched to outfit your vehicle for your own needs. Flexible and configurable, the EXO system can up to 290lbs of various gear on a 2" class III hitch. Connects RoadShower 4G and 7G to the EXO SwingBase or EXO TopShelf in seconds using the EXO cleat system Tool-free, locking SpeedKnobs attach and lock RoadShower 4G and 7G to EXO SwingBase or EXO TopShelf Heavy-duty steel construction with durable, powder-coated finish Includes all mounting hardware (EXO System and RoadShower are sold separately) Not compatible with RoadShower 10G