Hillman 8962 Slotted Hex Washer-Head Concrete Screw Anchor 3/16" x 1-3/4" Features: 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 easily installs with a matched-tolerance drill bit (included) Perfect for interior and exterior projects Use washer hex head screw for light to medium duty applications 5 pieces per retail package 10 Fas-Paks per sellable unit High-low chiseled threads on hex washer head screw cut into concrete allowing for steady drive and installation torque reduction Perma-Seal climate coating renders long-lasting corrosion protection Designed to fasten applications into concrete, brick and block