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. Galvanized. Size: Body dia: 8mm, Opening: 16mm, Screw Pin Thread: M10, Clear Length: 40mm, Pin dia: 10mm, S.W.L: 0.3ton.