These high-quality DRY WALL SCREWS COARSE THREAD BLACK PHOSPHATE are expertly made in Taiwan from Carbon Steel C1022, ensuring unparalleled strength and durability. Their Phillips Bugle Head design allows for easy installation and they have undergone rigorous testing to resist corrosion, providing impeccable quality and reliability. Available in a pack of 900, these #6x1 (3.5x25mm) screws are a trusted choice for any project.