Tapcon 24585 Blue Climaseal Phillip Head Concrete Anchors, 1/4" x 2-3/4", 150 PkTapcon Blue Climaseal Concrete Anchor is well known for its thread design and blue coating that give it superior holding strength and extra corrosion resistance. Includes tapcon bit. Secure attachment to concrete, block and brick. Does not require anchor torque down. Cracked and seismic approved. 1 4" x 2 3 4" Easy, fast and accurate Blue Climaseal coating is uniquely applied in multiple stages through dip spin technology for extra corrosion