Get this Fastenmaster TimberLok Coarse Steel Hex Head Heavy-Duty Wood Screws delivered onsite. No predrilling. Faster and easier than 3/8″ lag screw. Countersinking head style. Guaranteed corrosion resistance – ACQ approved. IBC/IRC code compliant – ICC-ES ESR-1078. Common project applications: remodeling, fencing, storage, cabinets, framing.