Deck Screw, Type Deck Screw, Head Type Round, Finish Climatek(TM), Material Steel, Screw Size 3/8 In., Fastener Length 16 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