Powers Fastening Innovations 2704SD 3/16-Inch by 2-1/4-Inch Tapper and Hex Head Carbon Steel Screw Anchor Blue Perma Seal, 100 Per Box For use in a variety of light to medium duty applications in base materials including concrete, masonry and wood Features a corrosion resistant Parma-Seal coating and an optimized thread design for lower torque 100 per box