Hardened M2 High Speed Steel Twist Drill Bits, Titanium-Nitride Coating Resists Heat for Increased High Speed Performance, Polished, Precision Roll-Forged Flutes , 135-Degree Split Point Starts on Contact, Reduces Walking, 3/8-Inch Reduced Shanks, Multi-Purpose Bits for Wood, Metal and Plastic. Contents: 33-pc. Drill Bit: 1/16-Inch (2pc.), 5/64-Inch (2pc.), 3/32-Inch, 7/64-Inch, 1/8-Inch (2pc.), 9/64-Inch, 5/32-Inch, 11/64-Inch, 3/16-Inch, 13/64-Inch, 7/32-Inch, 15/64-Inch, 1/4-Inch, 17/64-Inch, 9/32-Inch, 19/64-Inch, 5/16-Inch, 21/64-Inch, 11/32-Inch, 23/64-Inch, 3/8-Inch, 25/64-Inch, 13/32-Inch, 27/64-Inch, 7/16-Inch, 29/64-Inch, 15/32-Inch, 31/64-Inch, 1/2-Inch. Complete with Metal Index Case.