FastenMaster LedgerLOK screws are specifically designed to fasten deck ledger board to the rim joist of a house without any predrilling! These are the best replacements for lag screws and through-bolts. They've been coated using a 3-step process that protects against corrosion. Features a built-in washer head, thus saving time and money by eliminating the need for another washer. Available at Edmonton Fasteners!