The TowSmart X-Mount Ball Mount is a patented X-Mount design that channels away moisture to minimize seizing within the aperture of the receiver hitch. The X-Mount design also includes a lockrail system that allows you to torque the hitch ball with a single wrench. The lockrail functions as a built-in wrench preventing the hitch ball rotation during installation or removal from the X-Mount Ball Mount. Make sure to select the correct class for your towing application. Each X-Mount can be used in either the drop or rise position depending on your requirement when towing. TowSmart BAJA Collection - Class III "X" Mount Security Starter Kit w/2" Ball & 5/8" Lock, 5 1/4" Drop x 4" Rise 5000 lb: * Patented, anti-seize design allows less surface contact and channels away moisture to minimize rust build up * Provides rise and drop positions to ensure the level of towing * Easily connects your trailer to your vehicle for hassle free hauling * Constructed of corrosion-resistant material to withstand extreme weather conditions * Color: Black * Meets J684 testing standards It is important to know the total weight of the trailer (GTW) you are towing and the maximum towing capacity determined by the vehicle manufacturer.