Reese Towpower 21792 Class III Interlock Ball Mount The product is 2" Drop Ball Mount Easy and simple use kit The product is manufactured in China Class III has a 6,000 pound gross towing capacity Drop of 2 inch helps to adjust trailer level Shank length of 10-1/2 inch allows for more turning clearance from bumper to trailer frame Class III has a 6,000 pound gross towing capacity Drop of 2 inch helps to adjust trailer level Shank length of 10-1/2 inch allows for more turning clearance from bumper to trailer frame