The #10 x 2 1/2 Simpson Strong-Tie Square Head Deck-Drive™ DHPD HARDWOOD Screw is made of durable, corrosion-resistant 305 stainless steel and comes in a set of 100. Its designed with a #2 square head for secure fastening on hardwood surfaces. Easy to install with collated fasteners, this fastener is ideal for decking projects.