Universal Mounting Allows Cradles to attach directly to Inno Rack Crossbars as well as other aftermarket and most factory cross bar systems;Acts as a very effective stopper that prevents kayaks from sliding down kayak stacker upright posts while loading kayaks and strapping them down.;Completely stabilizes kayak during transport;Packaged as a pair of cradles for mounting to the front and rear roof rack cross bars;Includes universal mounting hardware and easy to follow instructions.