For use with Quik Drive fastening system. Quik Guard coating provides corrosion resistance for exterior and certain preservative-treated wood applications. Shank is designed to withstand the swelling and shrinkage that is common with fast-growth lumber. Ribbed head design countersinks easily and provides a clean finished appearance. Low-torque threads make for easier driving. High-low tip provides cleaner and faster starts. Tan color blends in better with most wood species.