FastenMaster LedgerLOK is the first wood screw engineered to fasten a deck ledger board to the rim joist of a house with no predrilling. 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.LedgerLOK replaces traditional 1/2 inch lag bolts, installing in a fraction of the time, and leaving you with a code-compliant, secure ledger to rim board connection. LedgerLOK is guaranteed to last for the life of the project.Refer to the LedgerLOK technical bulletin (included in each box) to determine the fastening pattern for your specific application.Includes 50, 5 inch ledger board screws, and 1 hex driver bit.Since 2003, thousands of PROs have trusted LedgerLOK to make ledger to rim board connections - its reliability and easy of use make it a staple on jobsites everywhere.From the ManufacturerSave time, money, and labor costs. LedgerLOK is the first fastener engineered to attach deck ledger boards to the rim board of the house with no predrilling. No need to predrill and hand-ratchet in 1/2 inch galvanized lags and washers. LedgerLOK also has stronger shear values than 1/2 inch galvanized lag screws. Plus, with LedgerLOK's smaller shank diameter, even a cordless drill (14.4 volts or higher) zips them right in, saving on battery life and additional tooling costs. Each pack size contains a free 5/16 inch driver bit. LedgerLOK fasteners are American made.