Compared to other masonry bits, Irwin® SpeedHammer Power™ masonry bits are manufactured with twice the carbide in the tip for longer life when drilling in rebar reinforced concrete. Manufactured with premium steel, these bits are optimized for cutting through concrete at high speeds. The flute has an outer groove that quickly removes dust and efficiently dissipates heat, increasing drilling speed and extending the overall life of the bit. Irwin® Masonry Drill, Series: SpeedHammer™ Power, 3/8 in Drill Bit, 6 in Overall Length, 4 in Cutting Depth, Spiral Flute, 4 in Flute Length, SDS-Plus® Shank, Right Hand Cutting Direction, Carbide Cutting Edge, Premium Steel, Applicable Materials: Rebar Reinforced Concrete