Towing Ball Mounts BM2 2" Drop or 1" Rise 8" length*, 6 lbs. BM4 4" Drop or 3" Rise 10" length*, 8 lbs. BM6 6" Drop or 5" Rise 15" length*, 12 lbs. * length measured from pinhole to ball hole centers        Easy Installs into a 2" Square Receiver        5,000 lbs. Gross Trailer Weight        Reducer Spacer included (3/4" Shanks)        500 lbs. Vertical Load        Allows a Variable Height Adjustment