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: 24mm, Opening: 48mm, Screw Pin Thread: M27, Clear Length: 81mm, Pin dia: 29mm, S.W.L: 2.5ton.