This particular adjustable ball mount is considered a class 3 ball mount and comes with an adjustable shank. It features a gross trailer weight capacity of 5, 000 lbs. and a tongue weight rating of 500 lbs. Unlike other adjustable ball mounts that have fixed trailer balls, this one comes with a trailer ball platform with a 1" ball hole, allowing it to readily accept the trailer ball of your choice. With its 1-1/2" adjustment increments, this class 3 adjustable ball mount has a maximum drop of 7-1/2" and a maximum rise of 6-1/4". It also features a total length of 12-1/2". All CURT adjustable ball mounts come with a 2" x 2" shank and are made with sturdy steel construction. For long-lasting rust, scratch and UV resistance, they also come with a gloss black powder coat finish to give you peace of mind for the road ahead. | Curt Adjustable Ball Mount (2" Shank, 1" Ball Hole) #45812