Simpson T10300WPP Hardwood Decking Screw, 316 Stainless, 350/Box Product Description Hardwood decking screws easily penetrate the hardest wood products. Unique 4-corner thread form with raised-ridge technology reduces driving torque. From the Manufacturer Simpson 316 Stainless Steel Hardwood Decking Screws penetrate the hardest wood products with ease. Unique 4-corner thread form with raised-ridge technology greatly reduces driving torque. Threads are approximately 2/3 up the shank to tightly draw the decking to the joist. 316 Stainless Steel for seaside applications and superior corrosion resistance. Features 6-lobe drive helps prevent cam-out Driver bit included in each box Pre-drilling recommended near board ends to prevent splitting Approximately 350 screws per 100 square feet of decking SSBIT20-2 is the replacement bit, Imported USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.