The heavy-duty CURT Class 4 Ball Mount is constructed from quality steel and features a 2" x 2" shank. Built to complement CURT class 4 trailer hitches, this ball mount is perfect for towing large boat trailers, RVs, livestock, and horse trailers as well as a variety of other farm and industrial-type trailers. (Never exceed the lowest weight capacity of any towing component.)This class 4 ball mount has a gross trailer weight capacity of 10, 000 lbs. and tongue weight rating of 1, 000 lbs. It has a standard drop of 2" or can be flipped to provide 1" of rise. It also features a hollow shank, allowing an anti-rattle hitch pin or lock to be used for reduced noise and vibration. As with most CURT ball mounts, CURT class 4 ball mounts are CNC-formed, robotically welded, and mechanically descaled to create a flawless product. This heavy-duty ball mount is finished in a gloss black powder coat to give it superior rust, chip, and UV resistance. It comes with 1-1/4" ball hole to accept a trailer ball with a 1-1/4" shank.• Fits trailer hitches with a 2" x 2" receiver tube opening• Equipped with a 1-1/4" hole to accept a trailer ball shank• 2" drop or 1" rise for precise trailer leveling• Hollow shank weighs less and can be used with an anti-rattle hitch pin• CNC-formed, robotically welded, and mechanically descaled for a perfect fit• Protected by a durable powder coat finish• Made in USA• Trailer ball and hitch pin sold separatelySpecsFinish: Gloss Black Powder CoatDrop: 2"Rise: 1"Receiver Size: 2"Gross Trailer Weight: 10, 000 lbs. Tongue Weight: 1, 000 lbs. Durable powder coat finish Standard 2" drop can be flipped for 1" rise 10, 000-lb. gross trailer weight / 1, 000-lb. tongue weight | 45310 Class 4 Ball Mount, 2" Drop in Black Made in USA