Simpson Strong-Tie T10300DWP Flat Head Hardwood Decking Screw, #10 x 3"Highly recommended for seaside applications and maximum corrosion resistance. Penetrate the hardest wood products with ease. Unique 4 corner thread form with raised ridge technology greatly reduces driving torque. 6 lobe drive helps prevent driver bit cam out resulting in easier driving and longer bit life. 316 stainless steel for seaside applications and superior corrosion resistance. Threaded approximately 2 3 up the shank to tightly draw the