DEWALT Rotary Hammer Bit, 0.375 in Diameter, 5 in Flute Length, 2 Flute, U Flute, 2 Cutter Heads, 10 in Overall Length, Carbide Cutting Edge, Spline Shank, 0.75 in Shank, For Concrete and Masonry Drilling Open head design channels dust into flutes for quicker drillingU-flute cleans debris out for fast, efficient drillingROCK CARBIDE tip maximizes carbide surface contact for longer bit life