Drop forged carbon steel shackle with a hexagon, metric coarse threaded bolt, which has a split pin hole at the end and a securing nut. Please specify Ungalvanized (Black) or galvanized shackle is required. Ungalvanized. Size: Body dia: 55mm, Opening: 83mm, Thread Bolt & Nut: M64, Clear Length: 187mm, Pin dia: 65mm, S.W.L: 18ton.