These Forgefix Hook Bolts are Zinc Yellow Passivated for increased durability and corrosion resistance. They have a tough and reliable construction to cover most heavy-duty fixing applications. The four-way expansion shield offers extremely strong and secure anchorage, and the specially manufactured retaining spring ensures encapsulation of the wedge during expansion. APPLICATIONHook bolts are commonly used to attach cables to objects for lifting or holding in place.Ensure the correct spanner is used to ensure accurate installation. The Zinc Yellow Passivation process of electroplating is similar to the ‘Galvanised’ and ‘Zinc Plated’ processes but with the addition of a yellow dye. It provides a coating that is aesthetically pleasing, and which offers excellent resistance to corrosion.