Deck Screw, Type Deck Screw, Head Type Round, Finish Climatek(TM), Material Steel, Screw Size 3/8 In., Fastener Length 8 in, Drive Star, Drive Size T40, System of Measurement Inch, Application For Structural Decking, For Framing, For Interior and Exterior Remodeling, For Ledger Board, For LVL, For Multi-Ply, Dimensional Standards ESR-2442, ICC-ES AC257, Features Unique Thread Design, W-Cut, Faster Penetration, For Use in Systems Wood, Head Height 0.197 in, Head Style Round, Head Width 0.699 in