A drop forged, carbon steel shackle with an eye bolt which has a metric coarse thread on one end. Please specify Ungalvanized (Black) or Galvanized shackle is required. Galvanized. Size: Body dia: 12mm, Opening: 20mm, Thread Bolt & Nut: M14, Clear Length: 40mm, Pin dia: 15mm, S.W.L: 0.9ton.