A drop forged, carbon steel shackle with an eye bolt which has a metric coarse thread on one end. Please specify Ungalvanized (Black) or Galvanized shackle is required. Galvanized. Size: Body dia: 26mm, Opening: 41mm, Thread Bolt & Nut: M30, Clear Length: 88mm, Pin dia: 32mm, S.W.L: 4ton.