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. Ungalvanized. Size: Body dia: 10mm, Opening: 17mm, Thread Bolt & Nut: M12, Clear Length: 34mm, Pin dia: 12mm, S.W.L: 0.6ton.