Silver Star 305 Stainless Steel Star Drive Wood Screws for Coastal Environments, Corrosive Applications and High Moisture Areas Where Extra Resistance is Needed * Star Drive offers twice the torque over Phillips or square drive screws * True Flat Head with Self-countersinking Nibs and Drag Reducing Knurled Shoulder * Type 17 Notched Extra Sharp Point reduces the need for pre-drilling * Deep, Wide, Sharp Threads and provides maximum holding power