The CURT 21100 Trailer Hitch Ball Hole Reducer Bushing is a must-have for anyone needing to adapt a trailer ball with a smaller shank diameter to a larger hitch hole. This yellow zinc-plated bushing reduces a 1-inch diameter hole to 3/4-inch, ensuring a secure fit.

Users rave about its perfect fit and durability. One reviewer mentioned it allowed them to reuse an existing ball, saving money. Another praised its quality and effectiveness, calling it a "cost-effective solution."

While most feedback is positive, some noted slight slop between the bushing and hitch hole. However, even these users reported no issues during use.

The durable yellow zinc finish offers weather resistance, and the product comes with a limited lifetime warranty (one year for finish, one year for parts). Note that the ball mount and trailer ball are not included.

Overall, the CURT 21100 is a reliable, high-quality solution for adapting trailer balls, making it a valuable addition to any trailering kit.