Big Timber BTX Flat Head Star Drive Wood Screws with Bronze Star exterior grade coating are ideal for all applications using hard or soft woods, chipboard and other projects where a corrosion resistant coating is needed. BTX screws feature sharp, deep cutting threads and a knurled shank for easy driving into wood. A notched quick-starting Type 17 point prevents the screw from “walking’ during installation.The Flat head with 6-Point Star (Torx) Drive features Self-Countersinking Nibs to draw the screw head flush to the work surface. The Bronze Star Triple dipped coating has shown over 1200 hours of corrosion resistance in salt spray testing and can be used with ACQ treated lumber. BTX screws are excellent for Decking, fencing, girt to post, siding, finish work and any exterior application where a coated treated lumber compatible screw is needed. Available in case lot quantities and convenient 1 lb. packages.