Fastener Drive Type: TORX Fastener Diameter (Imperial): 0.22" Fastener Length (Imperial): 3.5" . Structural wood screw • Double barrier coating • Mission-style decorative accents enhance the beauty of your outdoor living area • The outdoor accents structural wood screw reduces installation time by driving easily without predrilling • When combined with the load-rated hex-head washer, the solution delivers the decorative appearance of a bolted connection, but with a much easier installation (washers sold separately) • Black finish • 12 pack • DIMENSIONS: 3-1/2"