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: 26mm, Opening: 52mm, Screw Pin Thread: M30, Clear Length: 88mm, Pin dia: 32mm, S.W.L: 3.15ton.