A convenient place to stow fenders. Mounts on any rail and stanchion system. Movable J hooks mount on 1" - 1-1/8" rails and stanchion system, tightens to blend with any angle. Cross-reinforced for extra strength. Holds any style fender.Holds "Big B" and "Hull Gard" fenders effectively. Folds flat for easy storage. Holds 2 fenders Fits 7"-9" fenders