GRK Deck Elite Hidden Deck Screws provide a premium aesthetic by eliminating the visibility on decking top boards. GRK's Drill Point Tip design allows for a smooth, fast drive while reducing splitting. The Dual Thread design delivers superior clamping for long lasting, tight connections. GRK Deck Elite screws have a corrosion resistant coating to resist rust and keep decks looking like new. 316 stainless steel.