Simpson Strong Tie SDWH271200GR30 Hot-Dipped Galvanized .270 by 12" Screw (30 Piece) Sawtooth point design for fast starts and no predrilling Burly 0.276-Inch shank diameter for heavy-duty structural applications ASTM a153 class-c hot-dip galvanized coating suitable for coastal and marine environments Use for structural wood-to-wood connections including ledgers Quantity: 30-pieces