Very clever idea. Had to use on my 2013 Jeep Wrangler Unlimited Sahara with a lift kit and adjustable drop hitch. Spinning ball hitches for different sizes won't work in my case because the adjustable hitch height is a solid piece specific to the entire hitch. In order to tow my 2 different trailers I'd need 2 drop hitches. Interchangeable balls is the perfect solution and I have to say these are perfect. They work well and are rated around 8k pounds of towing. Saved a lot of money here compared to my closest towing accessory store.