5 lb, 2" x #9, power pro stainless exterior screws, self drilling point star borefast thread 2000 hr salt spray, knurled section prevents splitting, lifetime warranty.
Used to apply asphalt shingles, insulation board, and felt to wood substrates. Large flat head provides large bearing surface and strong holding power. Thick shank provides strength and durability. Do not use in treated lumber or where corrosion is a concern.