This listing is for a standard 5/8" diameter Hitch pin with securing hairpin clip. The 5/8" diameter is standard on 2" Receivers and Ball Mounts. This Hitch Pin provides 3 7/8" of easy usage space for securing your Tow Ball mount into your trucks hitch. With an item like this it is always handy to have extras lying around. This pin features a zinc plated finish for corrosion resistance.