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 through-bolts and lag screws, has been coated with a proprietary three-step coating process that protects against corrosion (even in pressure treated wood). The built-in washer head eliminates the need for an additional washer, saving money and time. The large hex-head allows for greater bit engagement, reducing cam-out.