Cushioned ball mount from Convert-A-Ball acts as a shock absorber and provides a 6" drop or 4-3/4" rise. Sturdy steel construction fits 2" square hitches. The GTW is 10,000 lbs.; TW is 2,000 lbs. Cushioned to protect tow vehicle's driveline and hitch assembly, as well as trailer's contents. Functions as a rise or drop to help you level your trailer. Slides into 2" square trailer hitch receiver and attaches with standard 5/8" hitch pin (sold separately).