The Performance W9004 2-Piece Step Drill Bits range from 3/16 to 1-3/8-Inch, each with a double-flute design for faster and smoother cutting. Features: Titanium-nitride-coated for cooler and longer running. Double-flute design for faster and smoother cutting. 12 Step: 3/16-Inch, 1/4-Inch, 5/16-Inch, 3/8-Inch, 7/16-Inch, 1/2-Inch, 9/16-Inch, 5/8-Inch, 11/16-Inch, 3/4-Inch, 13/16-Inch and 7/8-Inch. 11 Step: 1/4-Inch, 25/64-Inch, 35/64-Inch, 11/16-Inch, 13/16-Inch, 7/8-Inch, 1-Inch, 1-1/8-Inch, 1-7/32-Inch, 1-1/4-Inch and 1-3/8-Inch. What's included: Performance W9004 2-Piece Step Drill Bits Set.
- Titanium nitride coated for cooler and longer running.
- Double flute design gives you faster, smoother cutting.
- 12 step sizes: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16". 5/8", 11/16", 3/4", 13/16" and 7/8".
- 11 step sizes: 1/4", 25/64", 35/64", 11/16", 13/16", 7/8", 1", 1 1/8", 1 7/32", 1 1/4", and 1 3/8".
