Trailer Hitch Ball, Trailer Hitch Ball, Weigh Safe Trailer Hitch Ball, 2 5/16" Clam Shell Cap for 2" Tow Ball, 1. Converts 2" Tow Ball to 2-5/16" Tow Ball 2. Stainless Steel Construction 3. Expertly Crafted from Superior Materials 4. Provides Exceptional Reliability 5. Rated at 2" Tow Ball Rating, Trailer Hitch Ball.