This pair of galvanized steel 5/8-inch D-Ring Shackles from Rugged Ridge has a 6,000 pound working load limit (WLL). The red pin has a 3/4-inch diameter pin.. This pair of galvanized 5/8 inch D-Ring Shackles from Rugged Ridge have a 6,000 pound working load limit (WLL). The pin has a 3/4 inch diameter pin.