Manufactured for top performance in masonry-based applications, concrete screw anchors are designed to fasten objects into concrete, brick and block. The blue Perma-Seal finish on this Tapper provides long-lasting corrosion protection. Its high-low chiseled threads allow for a steady drive and installation torque reduction. Its various features and state of the art design make this anchor an excellent alternative to expansion anchors, plugs and lag shields. General applications and uses include window installations, interior hand rails, metal door frames, joint flashing, storm shutters, interior lighting fixtures, thresholds, and screened enclosures.