It is made by Reese ( renown maker of recreation products ). Adjustable & lockable . Mounts on your car's / SUV's rails OR on a truck's box rails and can be locked in place or removed whenever you want. You can carry luggage , cargo, cargo carriers , sports equipment , bikes , boxes , skis , canoes , etc..... . This have NEVER BEEN OUT OF THE BOX . Also , please check out my other ads.