The innovative mounting bases allow the installation of a car tent or a loading rack on the vehicle in just a few minutes, less time than required with traditional solutions. For safer installation, the torque wrench emits a sound that indicates when it is sufficiently tightened. For extra security, the bases lock onto the crossbars. There are no loose parts that can easily be lost or fall onto the car roof. No lifting of the tent is required for installation. Simply place it on the rail, turn, and tighten. Includes 4 mounting bases and a torque wrench. Compatible with a wide range of Thule roof racks, as well as crossbars from third-party manufacturers.