Tackle demanding materials with the 1/2 in. x 4 in. x 6 in. Rotary Percussion Drill Bit, made from copper braze material for high heat resistance. The chrome-vanadium spring steel shaft offers durability and a longer bit life. The double-ground, extra-deep flute increases visibility and speed. Made for hammer drills, this bit works with 3-jaw or Jacobs chucks.