Power Pro LedgerTite structural wood screws are designed for ledger connections, where a deck ledger board is attached to the house. This item is a single 5/16 in. x 3-5/8 in. screw, gray epoxy coated, individually flagged for sale as one screw. No driver bit is included. The Power Pro structural line installs up to 30% faster than the competition with no pre-drilling, has Grade 5 strength and higher pullout values, and is AC257 treated lumber certified and ESR-4017 wood-to-wood connection certified.