Irwin 10225 Step Drill Bit Set 41 Hole Sizes, 1/32 in_1/16 in Step Increments, Black Oxide Finish

Step Drill Bit Set, High Speed Steel, Black Oxide, 1/8 in to 1/2 in, 13/16 in to 1 3/8 in, 3/16 in to 1/2 in, 3/16 in to 7/8 in Size Range, Straight with Three Flats, Number of Drill Bits 3, Shank Hex Size 1/4 in, 3/8 in, 7/16 in Material - Machining High Speed Steel Shank Type Hex Finish - Machining Black Oxide Decimal Equivalent 0.125, 1.375 Cutting Direction Right Hand Number of Flutes 1 Number of Pieces 4 Step Thickness 1/32 in, 1/16 in Drill Bit Material High Speed Steel Includes 10231 (1/8 in to 1/2 in), 10232 (3/16 in to 1/2 in), 10234 (1/4 in to 3/4 in), 10221 (13/16 in to 1-3/8 in) Impact Rated No Measurement System Fractional Inch Step Increments 1/32 in, 1/16 in Drill Bit Point Type Speed Point Series UNIBIT Sub Brand Unibit Shank Type - Machining Straight with Three Flats Number of Drill Bits 3