This Miller Industries Hitch Adapter Ball Bracket for Conventional Wreckers is used on light-duty wreckers with a conventional under reach. This unit should fit any Century Formula 1, Century 411, Century 412, Holmes, or similar wrecker manufactured after March of 1996. This attachment allows you to tow a ball hitch type trailer with your wrecker. Hitch installs and is removed quickly, and fits in your side toolbox or tunnel box when not un use. Includes 2" ball. Popular with Convert-A-Ball adapter kit.