These Forgefix Vine Eyes simply screw into timber and similar materials. Drilling a pilot hole is advisable. The screws are zinc plated for increased resistance to corrosion, and the screw thread is suitable for use with all types of wall plugs. APPLICATION: Vine Eyes are used to attach cables, wires and twine for many numerous applications. Widely used in gardening and agricultural services. Zinc coatings prevent oxidation of the protected metal to create a longer lasting finish. It does this by forming a barrier and by acting as a sacrificial anode if this barrier is damaged. Zinc oxide is a fine white dust that (in contrast to iron oxide) does not trigger a breakdown of the substrate’s surface integrity as it is formed. The zinc oxide, if left intact, can act as a barrier to further oxidation, in a way similar to the protection afforded to aluminum and stainless steels by their oxide layers.