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: 24mm, Opening: 39mm, Screw Pin Thread: M 30, Clear Length: 111mm, Pin dia: 30mm, S.W.L: 3.6ton.