Power Pro TimberTite structural wood screws are a heavy-duty structural fastener ideal for landscape walls, decks, fencing and other wood-to-wood connections. They have a hex head. This item is a single 1/4 in. x 4 in. screw, black 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.