Drillco Masonry Drill, Imperial, Series: 1600A, 1/4 in Drill Bit, Rotary Percussion and Hammer Drilling, 12 in Overall Length, 6-5/8 in Cutting Depth, Spiral Flute, 6-5/8 in Flute Length, 1/4 in Shank, Round Shank, Right Hand Cutting Direction, Carbide Cutting Edge, Black/Gold, Applicable Materials: Granite, Marble, Concrete, Super Concrete, Polyester Glass, Hard Steel and Reinforced Products