The Lift supports carriers that are designed for 2in hitch receivers. When combined with our hitch adapter it will also support all carriers designed for a 1 1/4in hitch receiver. The Lift will also support all attachments that are designed to work with the roof rails of a vehicle. The Roof Rack attachment is specifically designed to be used only with The Lift to mount roof rail attachments, cross bars and all items that are transported on the roof of a vehicle.