IVY Classic 10356 3/4 x 18-Inch Premium Carbide Masonry Drill Bit, 1/2-Inch Reduced Shank, 1/Card Round shank designed for rotary and percussion hammer drilling through block, brick, stone, concrete and marble, Swift Cut (Registered Trademark) Tungsten Carbide reinforced head - precision ground Induction-hardened body ensures straightness and strength, sandblasted finish Engineered with wide flutes for fast dust removal Diameter: 3/4-inch, Overall Length: 18-inch, Shank: 1/2-inch Reduced Shank, Flute Length: 12-Inch