These Forgefix Screw Hooks are zinc plated for increased resistance to corrosion. They simply screw directly into timber and similar materials. Drilling a pilot hole is advisable. The screw head is also suitable for use with all types of wall plugs. APPLICATION: Screw Hooks are used to attach cables, wires and twine to many numerous applications. Also ideal as a storage accessory for use as a hanging hook. Pack of 10.