One-piece self-tapping concrete screw with ICC-ES Approval. For use in a variety of base materials including wood. Coated in a corrosion resistant Perma-Seal coating with an optimised thread design for low installation torque. Also incorporates a gimlet drill point for wood, no pre-drilling required. DeWalt Tapper-Pro Hex Head Self-Tapping Screws 6.3 x 57mm (100 Pack) in Blue This pack of Hex drive recess hex head masonry screws are constructed from a durable metal, 57mm in length. They have optimised thread design for lower installation torque. They're ideal for a range of DIY applications. One Piece Self-Tapping Concrete Screw For Use In A Variety Of Base Materials Including Wood. Features A Corrosion Resistant Perma-Seal Coating. Optimised Thread Design For Lower Installation Torque. Incorporates A Gimlet Drill Point For Wood (No Pre-Drilling Required) The Only Concrete Screw To Meet The 2012 Ibc And Irc Standards For 4 Different Base Materials.applications: Screen Enclosures. Exterior Metal Lighting. Storm Shutters. Marine Applications.PTDFORDIRDWT1400200