The Shocker Dropped Ball Mount attachment without hitch ball features a 1-1/4″ hole for the hitch ball and a 4-1/2″ to 7-1/2″ drop. The tow rating depending on the hitch ball installed. A 2″ ball would have a 10,000 lbs tow & 1,000 lbs tongue weight. A 2 5/16″ hitch ball would have a 16,000 lbs tow & 1,600 lbs tongue weight. It is designed to work with Shocker Air Receiver Hitches and Shocker Solid ball mounts.