The CURT Heavy-Duty Hitch Pin has been stringently tested to safely tow 21, 000 lbs. It easily secures heavy-duty ball mounts or other hitch-mounted accessories in the receiver tube. It's constructed from high-strength steel and has a rust-resistant zinc-plated finish for long-lasting durability. This heavy-duty hitch pin is made extra-long and has a 5/8" diameter to fit any 3" x 3" receiver with a 5/8" pin hole. It also features an included retainer clip and a grooved tip for easy clip access from any angle.• Fits any 3" x 3" receiver tube opening with a 5/8" pin hole• Tested and rated to 21, 000 lbs. GTW• High-strength steel construction with zinc-plated finish• Secures ball mounts and other receiver tube inserts• Grooved pin allows clip attachment at any angle• Bent handle for an easier grip• Retainer clip included• Before towing, be sure the hitch pin is in place and securely fastened with the clip• Never exceed the lowest weight capacity of any towing component Heavy-duty hitch pin is made extra long & has a 5/8"" diameter Fits any 3"" x 3"" receiver with a 5/8"" pin hole Retainer clip & a grooved tip for easy clip access from any angle | Curt Heavy-Duty 5/8" Hitch Pin and Clip