Hillman 47861 Power Pro Outdoor Wood Screw, 10 X 3 1/2-Inch, 321 pack 321 pieces per package Star Drive technology is twice as durable as phillips head drivers to prevent stripping 1000 Bronze Ceramic finish provides superior rust and corrosion portection Engeniered with a Type 17 tip and a dual flat head with nibs to bore into the wood to lay flat and eleminate predrilling pilots Steel cross-cut thread makes driving easy and prevents splitting