Manufactured for top performance in masonry-based applications, Hillman Tapper Concrete Screw Anchors are designed to fasten objects into concrete, brick, and block. This screw is also an excellent alternative to expansion anchors. Perma-Seal climate coating renders long-lasting protection against corrosion and the elements. Unique thread design allows for a steady drive and torque reduction when installing in concrete. Use for window installations, interior handrails, metal door frames, storm shutters, interior lighting fixtures, thresholds, or screened enclosures.