Drywall Screw with Countersunk Cross-Heads are offered in different size ranges such as 3.5 mm X 25mm, 3.5 mm X 35 mm and 3.5 mm X 50 mm. The Drywall Screw is fitted with countersunk cross-heads. The Drywall Screw is a type of corrosion resistant self-tapping zinc plated screw with screw driver bits. Drywall Screw with Countersunk Cross-Heads is mainly designed to fix plasterboard to metal framework.