Self-tapping Screws, Used for Woods, Decks, Fences, Residential, and Outdoor Projects Made of C1022, zinc plated Applications: woods, decks, fences, residential, and outdoor projectsMade of C1022 materialAvailable in various sizesSpecial function: for attaching wood, deck, and timberExtra enhancement: plating can be yellow zinc, black/gray phosphate, nickel, and brass