LedgerLOK is the first fastener engineered to attach deck ledger boards to a wooden house structure with no predrilling. LedgerLOK is approved in ACQ pressure treated lumber. The built-in washer head eliminates the need for an additional washer, saving time and money. Faster, Easier and Stronger than 1/2” Lag screws. IBC / IRC code compliant. Available in 3 5/8” and 5” lengths. Sold in 12ct, 50ct or 250ct Boxes.