Curt Manufacturing offers several different types of ball mounts, from the standard design to heavy-duty to our specialty ball mounts. For each kind, we offer options for shank size, length, drop, rise and more. But we do not stop there. The Curt Manufacturing ball mount accessory line is a careful collection of special products that are designed to complement and enhance the function of your ball mount.Installing and torqueing a trailer ball on your ball mount can be a major inconvenience when you are looking to get going on your trip. Instead of trying to handle two wrenches at a time and keep the trailer ball in place while you get it tightened, the Curt Manufacturing ball mount tongue sleeve makes things easier. The ball mount tongue sleeve allows for single-wrench tightening and torqueing of a trailer ball. This ball mount installation accessory simply fits over the mounting platform of your ball mount and accepts a trailer ball, holding it in place and keeping it from turning as you tighten the nut. Simply let the ball mount do the work! The Curt Manufacturing ball mount tongue sleeve is designed for 2" ball mounts with 2 1/2" ball mount tongues and fits wrench-flat trailer balls only.