The Class III Ball Mount a 6†drop or may be inverted for a 4†rise. Fits into 2†x 2†receivers. Drop: 6†Rise: 4†Ball Hole diameter: 1†Pin Hole Diameter: 5/8†Drop Capacity: 5,000 lb. GTW / 500 lb. TW Rise Capacity: 3,500 lb. GTW / 350 lb. TW