기능

• The material is iron (trivalent chromate plating) with head coating.
• Screws with square holes can be screwed stably because the screwdriver is inserted more firmly than the cross hole.
• The special shape of the tip makes it hard to crack wood and easy to hit even the edge of wood.
• With dedicated square bit (NO. 2).
• Used to attach metal fittings to wood.
• The recommended hole diameter for the bracket is 4~5 mm.