Youll be amazed at the difference an auger point makes on a Stainless Steel screw! Great for use with pressure treated wood, or premium materials like Redwood and Western Red Cedar because they are truly self-drilling. Wood screws are designed to attach two pieces of wood together. They generally feature a smooth, unthreaded shank below the head which ensures a tight attachment, and the threaded portion of the shank is tapered to increase the holding power. Threads specially designed for use in wood effectively resist pulling out. Phillips drive decking screws are screws that you can use to fasten wood and composite decks to main beams. These stainless-steel bugle head decking screws resist corrosion, so they are a perfect fastener for outdoor decks, since they can withstand a variety of exterior stresses and weather conditions. Length is measured from the top of the head. Lay flat with the surface they are installed in. The type-17 point allows you to start fast and get the screw into the wood cleanly and easily, with coarse threads about 2/3 of the way up the shank to draw the decking into a tight seal with the substrate. Newport Fasteners’ phillips drive decking screws are versatile enough that you can use them for all types of wood decking, including preservative-treated woods. You will usually need about 350 to fasten 100 square feet of decking, assuming 6-inch, nominal-width boards installed on 16-inch joists.