Tapcon 4-Pack 3/16" x 4-1/2" Concrete Drill Bit, made of steel with a straight shank, is designed for drilling holes in brick and concrete. This drill bit has a diameter of 3/16" and a length of 4.5", with a drilling depth of 2.5". It is not self-feeding and has a standard impact driver capability. Manufactured with tighter tolerances than ANSI standards, Tapcon Carbide-tipped Drill Bits are engineered to drill holes that deliver optimal performance when used with Tapcon Concrete Screw Anchors. Seamlessly use Tapcon Drill Bits with Tapcon anchors to ensure drilling precise holes and achieve maximum holding power.