Get this Tapcon Star Flat-Head Concrete Anchors delivered onsite. Eliminates bit slip with star recess. Tapcon concrete screws work in all masonry-based material including concrete, block or brick. Use Tapcon screws for a variety of projects including fixing sill plates, electrical equipment, 2 x 4’s and many other fixtures to masonry. Chisel edges on Tapcon concrete anchors accurately cut threads into concrete allowing for consistent driving performance and back holding power. Climaseal blue coating delivers long-lasting corrosion protection.