Yakima Towers that can adapt to attach to rooftops on many vehicles.
This set came off a newer Honda CRV and adapted to the luggage rack.
Includes four Towers, with landing pads and base plates.
If the base plates don't fit your vehicle it is simple to get the right ones from Yakima.
Adapter fittings are included that allow the use of a round or an "aero" flatter-style cross bar (these are $50 new)
Two 58 inch round Yakima cross bars are included as shown... not pretty but very functional.
The bars alone sell for $90 new.