Wood Screws No. 12 S X 2-1/2" L Star Bronze 5 lb Bronze

High-Quality Heat-Treated Steel for high tensile and superior shear strength. Handles 2X the torque of Phillips or square drive while extending the life of the bit. Self-Drilling Tip gives screw a drill capacity (through metal) up to 1/4 inch recommended drill speed is 2000 RPM. Deep chip cavity collects metal shavings to prevent interference with cutting threads. Metal wings on the screw shank are designed to ream out the wood then break off when they encounter metal wings prevent the screw thread from engaging into wood before the metal.