LedgerLok is a code-compliant structural wood screw engineered to fasten a deck ledger board to the rim joist of a house with no predrilling. LedgerLok replaces lag screws and through-bolts, has been coated with a proprietary three-step coating process that protects against corrosion (even in pressure treated wood) and is ACQ approved. The built-in washer head eliminates the need for an additional washer, saving time and money. The large hex-head allows for greater bit engagement, reducing cam-out.