The Ultimate Construction Screw -Fully specced for structural applications. Star and Hex Drive reduces Cam-out and for easy slip-free driving. Unique serrated thread for secure fastening. Most of our line offers a Type 17-point which eliminates the need for pre-drilling and reduces wood splitting. (Timber Screws, Hex Head Construction, & Ledger Screws are not equipped with Type 17-point). Exterior screws areencased with our premium XL 1500 coating to resist the environment, wood acids & treatment. Top quality alloy steel and are case hardened. Engineered to make them the best choice for professional and home use.