Simpson Strong-Tie No. 5 X 10 in. L Star Low Profile Head Bold Structural ScrewsThese screws are designed to be an easy to install, high strength alternative to through bolting and traditional lag screws for a wide range of fastening applications. Bold thread design provides superior holding power. Patented 4CUT tip to ensure fast start, and reduced installation torque eliminating pre drilling in most applications. Large head provides maximum bearing area. Double Barrier coating makes screw suitable for exterior and preservative