With multiple settings, the JayLow allows you to carry one boat in J-Cradle position, two boats in vertical position plus folds down when not in use. It comes fully assembled out of the box with tool-free installation on round, square, factory or aerodynamic roof bars. Adjust the upright position with the easy-to-use integrated cam lever. Comes complete with heavy-duty straps and bow/stern tie-downs. Supports one boat up to 36 kg or two boats with combined weight of 50 kg or less.