LedgerLoks are the first wood screws engineered to fasten a deck ledger board to the rim joist of a house with no predrilling. The hex-head version allows for greater bit engagement, reducing cam-out. The Flat Head style, with TORX ttap drive system, provides flush to ledger installation saving additional time and money. 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.