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: 30mm, Opening: 60mm, Screw Pin Thread: M36, Clear Length: 102mm, Pin dia: 36mm, S.W.L: 4ton.