Carbide bits are recommended for use in masonry.
Concrete screws cut their own threads when used in concrete, block or brick. Masonry Screw, Flat, Blue Perma Seal Typically 100 degree flat or for fastening softer materials, 82 degrees flat.3/16x1 3/4 phillips flat concrete screw with drill bit blue perma seal. Flat head screws are used when protrusion of the fastener above the mating surface is unacceptable.