Battery clamp down bracketThis can be used to hold down small to moderate sized leisure or system batteries on campers etc.. It is adjustable to various sizes and has two butterfly nuts and hook rods. This can clamp lengthways or sideways. if you do not have anything to hook to but have a wooden floor then you can drill holes in the floor the hooks will pass through from underneath and place a large washer under the hook to spread the load under the floor.