OneMount Dual Ball Adjustable Ball Mount with 2 inch and 2-5/16 inch Hitch Balls , fits 3 Inch Receivers
Amazon.com: Advanced Engineering Group OneMount Pintle Hook and 2-5/16 Inch Ball Combo (10215) with Adjustable Shank for 2-1/2 Inch Receivers : Automotive
TowSmart Class 3 Up to 10,000 lb. 1-7/8 in., 2 in, and 2-5/16 in. Ball Diameters TriBall Adjustable Trailer Hitch Ball Mount 1166 - The Home Depot
One Mount Adjustable, Dual-Ball Mount for 2 Inch Receivers
Trailer Hitch | Equipment World
One Mount Towing System — 14,000-Lb. Capacity, Dual 2in. and 2 5/16in. Balls, Model# 10001 | Northern Tool