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: 20mm, Opening: 40mm, Screw Pin Thread: M24, Clear Length: 68mm, Pin dia: 24mm, S.W.L: 1.5ton.