Drywall screws are the best way to fasten the drywall to the base material. drywall screws provide the perfect solution for different kinds of drywall structures. Mainly used for fastening the drywall panels to metal or wood studs, the drywall screw with fine threads for metal studs and the coarse threads ones for wood studs. Also used for fastening iron joists and wooden products, especially suitable for walls, ceilings, false ceiling and partitions. The special designed drywall screws can be used for building materials and acoustics construction. Black-oxide steel screws are mildly corrosion resistant in dry environments. Zinc-plated steel screws resist corrosion in wet environments. Black ultra-corrosion-resistant-coated steel screws resist chemicals and withstand 1,000 hours of salt spray.