Grip-Rite PrimeGuard Plus Premium-Coated Combo Exterior Screw Galvanized base with coated finish. Carbon Steel C1022. Combination drive coarse thread screws with high corrosion-resistant, long life coating. Packaged in a cardboard box. The screw color is similar to the color of treated wood. Compliant for treated lumber. Type 17 drill tip drives into wood without pre-drilling. Thread pattern reduces wood splitting and friction. Galvanized gray coated. Drive Type Combination, Size #10 x 3-1/2 In., Material Steel, Head Type Bugle, Finish Galvanized, Color Green, Approx. Coverage 284.1 Sq. Ft., Thread Diameter #10, Length 3-1/2 In., Package Size 18.5 Lb., Bit Size #2, Pkg Qty 1000, Package Type Box Warning Cancer and Reproductive Harm. www.P65warnings.ca.gov