Assembled Product Length: 8" Fastener Drive Type: TORX Fastener Diameter (Imperial): 0.22" Fastener Length (Imperial): 8" . Bold thread design that provides superior holding power. 4CUT tip that ensures fast starts, reduces installation torque and eliminates the need for pre-drilling in most applications. Under-head nibs that offer greater control when seating the head. Large washer head provides maximum bearing area (0.75" head dia.). Size identification on all SDWS screw heads. Double-barrier coating provides corrosion resistance equivalent to hot-dip galvanization, making it suitable for certain exterior and preservative-treated wood applications. Ideal for structural wood-to-wood connections including ledgers. 12 pack