5/16" x 4" X 6", Hammer Drill Bit, Ideal For Concrete, Brick & Masonry, Perfect On-Center Diamond Tip Grinding For Fast Starts & Drilling, Deep U-Flute Design Debris & Increases Drilling Speed, Carbide Tipped, Straight Shank, Fast Impact Drilling In Concrete, Stone & Masonry, Low Voltage, High Temperature Brazing Prevents Carbide Cutting Edge From Breaking Out Even When Heat Builds Up During Deep Drilling, Milled U-Flute & Deep Cut, Spiral Single-Flute Designs & Diamond Ground Carbide Tip Allow Fast Removal Of Drilling Dust.