These best-selling easy-to-use hook style boat ladders mount to the side of your boat (the gunwale). The hooks fold in flat for easy use and storage and use. Hook style for easy mounting or removal when not needed. Vinyl covered hooks fold easily for storage. Choice of aluminum or steel frame. 7" vinyl hooks. Frame Material: Stainless Steel. Dimensions: 5"L x 40"H x 15"W.