Lucky Joes High quality heavy duty 1300 LB 600+ KG test rated Nickel chrome Brass Crane Barrel Swivels stainless steel eyelets very strong. Great for most anything including shock cords to keep your line from twisting while trolling for the big ones. Can be used on trot lines or cod lines outriggers and multiple other uses. Length 2 1/4 inches inside eye 7/16 just shy of 1/2 inch many many uses for these heavy duty swivels