The Inno INA451 Cradle Set is the must have accessory for loading kayaks onto kayak stacker style carrying systems. Acts as a very effective stopper that prevents kayaks from sliding down kayak stacker upright posts while loading kayaks and strapping them down. Also completely stabilizes kayak during transport. Packaged as a pair of cradles for mounting to the front and rear roof rack cross bars. Includes pair of padded cradles, universal mounting hardware and easy to follow instructions.