#10 x 3 in. T-Star Plus Flat Head Partial Thread Yellow Zinc Screws (5 lb. Box)Stay Stronger for Longer! Heat Treated Grade 5 Durability. Subjecting the screw to heat treating gives greater strength and reduces breakage. Tested under the tougest scenerios to give you confidence in every connection. No required pre drilling in wood. Be more efficient on the job by eliminating time consuming steps with self drilling SPAX UNIQUE 4CUT POINT technology. Patented MULTIhead countersinks the screw head flush in wood. Keep a smooth