Dry Wall Screws Coarse Thread Black Phosphate #6x1 (3.5x25mm), made in Taiwan, are high-quality fasteners designed for secure fixing in drywall and wood applications. Manufactured from durable steel with a black phosphate coating, they provide good corrosion resistance and smooth driving performance. The coarse thread ensures strong holding power, while the sharp point allows easy penetration without pre-drilling. Supplied in a pack of 900 pieces, these screws are ideal for professional and interior construction use where reliability and consistent performance are essential.