Reese Towpower Interlock Hitch Draw Bar: * Receiver box opening is 2" x 2" * Hitch ball hole size is 1" * Draw bar drop is 3-1/4", with a 2" rise * Weight capacity: 500 lb tongue weight; 5,000 lb gross towing weight * Size: 2" x 9-1/2" * Model# 2179311