Features Galvanized per ASTM A153 Forged, heat-treated body and pin Alloy steel shackles meet Federal RR-C271D standards. For applications where the shackle is removed frequently. Each features a safety pin for added security. Shackles are permanently marked with size and working load limit (WLL), in tons. Wide-body shackle units have a powder-coat finish. Pin Style / Screw Working Load Limit / 3000 lb Width Between Eyes / 3/4 in Pin Dia. / 1/2 in Body Size / 7/16 in Body Material / Forged Steel Finish / Galvanized Pin Material / Forged Steel Standards / ASTM A153, RR-C271D