BluGranite Turbo, 1/4" x 10" x 12", Carbide, Hammer Drill Bit, Upgraded Build Delivers 5X Life & 2X Speed Over Standard Masonry Bits, Hex Shanks & Impact Rated Allows Use In Impact Drivers & Hammer Drill/Drivers For Added Versatility, 4 Grind Head Delivers 2 More Cutting Angles For Longer Life & Faster Speed, Multi-Grind Carbide Centering Tip Offers Accurate Starts In Brick, Masonry & More, Robust Bit Head Provides Long Life In Impact Applications, Milled U-Flutes With Deep Cut Spirals Delivers Fast Dust Removal, Bosch-Made Carbide Delivers Outstanding Durability Under Heavy Loads, 1/4" Diameter, 10" Flute Length, 12" Length, 12" Overall Length, .25" Shank Diameter, 10" Useable Length.