IRWIN 10233 Unibit #3 Step Drill Bit, 9 Hole Sizes, 1/4 to 3/4 in, 1/16 in($25.59Value)
Step Drill Bit, High Speed Steel, Black Oxide, 1/4 in to 3/4 in Size Range, Straight with Three Flats, 3/8 in Shank Diameter, 2 1/2 in Overall Length, Maximum Drilling Depth 1/8 in