Switch Hitch Class lV 3 Ball Trailer Hitch Revolutionary design in Class lll/ lV 3 ball hitches with up to 10,000 lb gross towing capacity. Patented switching and locking mechanism so balls can be switched without removing from receiver. Ball sizes are 1-7/8", 2", and 2-5/16". Milled from solid steel bar with carbon steel locking pin and grease fitting to ensure years of trouble free operation. Backed by Limited Lifetime Warranty. One quick switch.....One tough hitch.