JIF Marine DJX Dock Lift Ladder The JIF DJX Dock Lift Ladder is a great choice when you are wanting to be able to lift the ladder above the waterline. This ladder offers a retractable design that slides up above the water when not in use. This ladder comes in a variety of step options from 3 to 7, with standard 2 and widths 4 available. Determining the right size ladder should take into consideration how far the top of your dock is from the waterline and the distance between each step on the lad