Hillman 10 x 3-1/2 Galvanized Deck Screw, Dual Torq™ Drive screws are specially designed to provide superior resistance against corrosion, making them i for use in harsh outdoor environments. These galvanized deck 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, as these materials may react differently with galvanized fasteners. Whether you are building a new deck or repairing an existing one, these screws reliable performance and ease of installation with the Dual Torq™ drive system, which helps reduce cam-out and strip-out during driving. Model Number: