Features: * For use in exterior applications and with all treated lumber * 10-year manufacturer"s warranty against rust and corrosion * Tannic acid found naturally in lumber can cause staining and streaking * The use of PrimeGuard Plus stainless steel fasteners is recommended for all outdoor projects * Use for docks, piers, or within 5 miles of the coastline * Ten/Phillips head * 3-1/2-inch length * 1 lb box What"s In The Box: * Grip Rite PTN312S1 3-1/2-Inch PrimeGuard Ten/Phillips Exterior Screw - 1 lb. Box