If you own multiple trailers or frequently tow a variety of loads, you know how much time and money are spent tailoring your towing system to each and every individual trailer. There is nothing more inconvenient than switching back and forth between a few different ball mounts and trying to remember which mount fits with which trailer. A CURT adjustable ball mount is your multipurpose towing solution. The CURT adjustable channel mount #45902 features two different trailer ball sizes to accommodate two different coupler sizes: 2" and 2 5/16". It also features an adjustable shank assembly with multiple mounting holes for varying ball heights. This allows you to make your trailer completely level in any towing situation. This replacement dual-ball for the CURT adjustable channel mount #45902 offers a gross trailer weight capacity of 10,000 lbs. for the 2" ball and 20,000 lbs. for the 2 5/16" ball. It allows you to tow a variety of heavyweight trailers, and it is protected in a durable zinc-plated finish.