When you demand more from your towing equipment, CURT heavy duty ball mounts answer the call. For towing those especially heavy loads and bulky trailers, you need a ball mount that knows how to handle itself when the going gets tough. Our heavy duty ball mounts are constructed from quality steel and feature a 2 Inch X 2 Inch shank. They are built to complement CURT class 4 trailer hitches and are perfect for towing large boat trailers, RVs, livestock and horse trailers as well as a variety of other farm and industrial type trailers. With a few different drop height options and the ability to flip for optional rise, CURT heavy duty ball mounts are built to work as hard as you do, from sunup to sundown. This HD ball mount has a gross trailer weight capacity of 10,000 Pound and tongue weight rating of 1,000 Pound. It measures 9 3/8 Inch in length, has a 8 Inch drop and can be flipped to provide 6 3/4 Inch of rise. As with most of our ball mount line, CURT class 4 ball mounts are CNC formed, robotically welded and mechanically descaled to create a flawless product. We finish our heavy duty ball mounts in a gloss black powder coat to give them superior rust, chip and UV resistance. They also features 1 1/4 Inch ball hole to accept a trailer ball with a 1 1/4 Inch shank.