Spax 4191020450806 #9 x 3-1/4" T-Star Yellow Zinc Flat Head Wood Screw (1 lb Box) Check out our Threads!! our patented thread technology allows the screw to be driven faster, is easier to install, and reduces splitting in wood. Let Spax take some of the hassle out of your next project No required pre-drilling in wood. Be more efficient on the job by eliminating time consuming steps with self drilling Spax T-Star plus head provides superior bit engagement. Better bit engagement means quicker installation with less effort Patented MULTIhead countersinks the screw head flush in wood. Keep a smooth surface on your project for greater design and functional qualities This superior wood construction screw is coated with Yellow Zinc to protect the screw so your interior project will last