Stainless steel Trailer Coupler features a heavy-duty safety latch to help prevent accidental uncoupling and a padlock hole with provided "quick pin" for trailer security. This coupler is made of grade 304 stainless steel to maximize corrosion resistance and durability, and available in multiple sizes. Fits 2" ball size. 2" channel width. 3,500lb. towing capacity. Attach with 1/2"dia. x 3"L bolts.