Carrying and switching between different towing ball hitches to correctly match whatever trailer you need to tow, especially when helping friends and family that have a variety of different trailer tongue heights and ball sizes, can get challenging and expensive so getting this Adjustable Trailer Hitch with 2 integrated ball sizes will simplify towing in the future. This product includes a locking hitch pin with 2 keys which adds value to this specific product. Taking a close look at the welds along the steel joints does show that the welding quality is not the best but good enough to get the job done. Neither of the towing balls is marked with the ball size so I measured to confirm actual sizes which are 2-inch and 2-5/16 inch. Last 4 photos below show measurements of both tow balls of this new hitch plus 2 comparative tow ball sizes from my old single ball hitches. The new 2-inch ball is a bit smaller diameter than a typical 2-inch tow ball but should be adequate. The new 2-5/16” tow ball is nearly identical to my old same sized tow ball.