Known for its 4-, 6-, 8-, and 10-inch drop Diversi-Tech ball mounts, Premier Trailer Towing Products now offers a Ball Swappers upgrade to help ease the pain of having to buy several balls for different trailers. The Ball Swappers system comes with 1-7/8-, 2-, and 2-5/16-inch stainless-steel interchangeable balls that need no tools for easy exchange. A spring-loaded locking pin holds it in place with a capacity up to 12,000 pounds. Also available is a heavy-duty set that includes a 2-5/16-inch ball rated for 12,000 pounds and a 2-inch ball rated for 10,000. Pricing from $490 to $610.