316 Stainless Steel DFS Deck Screws are made of high strength 316 stainless steel material. This material offers the perfect blend of high strength and corrosion resistance. DFS Deck Screws are ideal for outdoor projects such as deck substructures, boat docks, pergolas, and bulkheads. Our screws are shipped in reusable, weather resistant plastic totes. Reverse threads on the shank of the screws help prevent the screw from backing out of its application. Each box of DFS Deck Screws includes 2 torx drive bits.