Hillman 10 x 4-1/2 Galvanized Deck Screw, Dual Torq™ Drive are specially designed fasteners that provide excellent resistance to corrosion, making them i for use in harsh outdoor environments. These screws are the preferred choice for securing pressure treated lumber, ensuring long-lasting durability and strength in your decking projects. However, they are not for use with cedar or redwood materials, as they may not optimal performance with these woods. With their galvanized coating and dual Torq™ drive design, these deck screws deliver reliable fastening power and enhanced corrosion protection for your outdoor construction needs. Model Number: