Dec-Smart galvanized base with PrimeGuard Plus coating finish. Flat counter sinking head. Combo drive, extra coarse thread screws with high corrosion-resistant, long life coating. Packed in cardboard box with window. 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. For all exterior applications, including decks, docks, fences, andgazebos.