The JayLow allows users to securely carry one boat in J-Cradle position, and two boats in vertical position. Features: Fully assembled right out-of-the-box Tool-free, and installs to round, square, factory and aerodynamic bars Easy to use, integrated cam lever adjusts the upright position Folds down when not in use for easy storage Easy loading with the integrated ramp Includes Heavy-Duty Straps and Bow/stern tie-downs Compatible with SKS locking system Compatible with a variety of different crossbars