The Tapcon 1/4 in. x 2-3/4 in. Polymer-Plated Steel Hex-Washer-Head Indoor/Outdoor Concrete Anchors (75-Pack) is designed for fastening in concrete, block and brick. The anchors are coated with Blue Climaseal for corrosion resistance. Blue polymer-coated finish. Reversible and removable. Drill and drive to install.