Weldless, drop forged, carbon steel shackle with an eye bolt which has a metric coarse threaded end. Please specify Ungalvanized (Black) or Galvanized shackle is required. Ungalvanized. Size: Body dia: 16mm, Opening: 26mm, Screw Pin Thread: M 18, Clear Length: 70mm, Pin dia: 19mm, S.W.L: 1.6ton.