Manufactured for top performance in masonry-based applications, the Hillman Blue Slotted Hex Washer-Head Concrete Screw Anchor is designed to fasten objects into concrete, brick and block. A Perma-Seal finish on this hex cap screw provides long-lasting corrosion protection. High-low chiseled threads on this washer hex head screw allows for a steady drive and installation torque reduction. Add this hex washer head screw to your tool kit today. Uses include: window installations, interior hand rails, metal door frames, joint flashing, storm shutters, interior lighting fixtures, thresholds, and screened enclosures Easy to use hex cap screw is easily installed with a matched tolerance drill bit (include) Perfect for interior and exterior projects Use hex washer head screw for light to medium duty applications 10 Fas-Paks per sellable unit 4 pieces per retail package High-low chiseled threads of washer hex head screw cut into concrete allowing for steady drive and installation torque reduction Designed to fasten applications into concrete, brick and block Perma-Seal climate coating renders long-lasting corrosion protection Excellent alternative to expansion anchors, plugs and lag shield