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: 12mm, Opening: 24mm, Screw Pin Thread: M14, Clear Length: 40mm, Pin dia: 15mm, S.W.L: 0.6ton.