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. Galvanized. Size: Body dia: 38mm, Opening: 76mm, Screw Pin Thread: M45, Clear Length: 129mm, Pin dia: 45mm, S.W.L: 6.3ton.