Hillman 8969 Slotted Hex Washer-Head Concrete Screw Anchor 1/4" x 2-1/4" 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 washer head screw is easily installed with a matched tolerance drill bit (included with C-Paks) Perfect for interior and exterior projects Use hex cap screw for light to medium duty applications Various DOT approvals Washer hex head screw is an excellent alternative to expansion anchors, plugs and lag shield 10 Fas-Paks per sellable unit 5 pieces per retail package Designed to fasten applications into concrete, brick and block Perma-Seal climate coating renders long-lasting corrosion protection