One of the most versatile and easy-to-use dog ladders on the market. Get your dog back into the boat without hauling him in and getting wet and muddy. Hook arms simply grasp the gunwale of the boat. Fully adjustable supports extend from 17" to 21" to allow the ladder platform to be positioned anywhere on the boat. Nonslip, powder-coated finish. Lightweight aluminum construction. Folds for easy storage. No tools required for assembly.