Get this Fastenmaster 6" in. FlatLOK Structural Deck Screw for delivery. No predrilling. Faster and easier than 3/8 in. lag screw. Countersinking head style. Guaranteed corrosion resistance ACQ approved. IBC/IRC code compliant ICC-ES ESR-1078. Free bit in every package. Common project applications: remodeling, fencing, storage, cabinets, framing.