Order this Fastenmaster External Hex Head Ledger Board Fastener for delivery to your job site. No predrilling. Replaces traditional ½” lag screw. Number 1 structural wood screw engineered for ledgers. Hex washer 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.