Yes it is, and buy the biggest capacity ball you can find. Some 2 5/16 balls come in 6,000 lb. ratings with a 1" shank. Go to a trailer supply store and get at least a 10,000 lb. ball with a 1 1/4 shank. Overkill I know but I bought a "Larin" heat treated ball thats rated at 25,000 lbs. with a 1 3/8 shank, never have to worry about that breaking.