A weldless, drop forged, carbon steel shackle with an eye bolt which has metric coarse threads on the end. Please specify Ungalvanized (Black) shackle or Galvanized shackle is required. Ungalvanized. Size: Body dia: 20mm, Opening: 40mm, Screw Pin Thread: M24, Clear Length: 100mm, Pin dia: 24mm, S.W.L: 1.8ton.