Curt Manufacturing 45240 Towing Wiring Fits trailer hitches with a 2" x 2" receiver tube opening Features two hitch pin holes for 9 1/4" or 12 1/4" length Equipped with a 1" hole to accept a trailer ball shank 4" rise or 6" drop for precise trailer leveling Hollow shank weighs less and can be used with an anti-rattle kit