Order this Phillips Flat Head Tapcon Concrete Screws for delivery to your job site. Works in all masonry-based material including concrete, block, or brick. Use these screws for a variety of projects including fixing sill plates, electrical equipment, two by fours, and many other fixtures to masonry. Climaseal blue coating delivers long-lasting corrosion protection. Chisel edges accurately cut threads into concrete allowing for consistent driving performance and back holding power. Advanced threadform reduces installation torque by 30%, allowing for use in a wider range of materials. A reputation for quality, strength and ease of installation from industry professionals. Made in the USA. Approved for use in ACQ Treated Lumber.