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 applicationvine 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