XtremepowerUS Heavy Duty 3-in-1 Tri-Ball Mount Trailer Hitch and Ball Mount 3 Size Ball Mounts in 1 Ball Size: 1-7/8", 2", 2-5/16" Chrome Plated Balls Capacity: 1-7/16"-3500lb, 2"- 5000lb, 2-5/16"-6000lb Pin Hole Diameter: 5/8"