A drop forged, carbon steel shackle with an eye bolt which has metric coarse threads at one end. Please specify Ungalvanized (Black) or Galvanized shackles is required. Ungalvanized. Size: Body dia: 40mm, Opening: 80mm, Screw Pin Thread: M48, Clear Length: 136mm, Pin dia: 48mm, S.W.L: 7ton.