IRWIN UNIBIT 20 Step Drill Bit, 8 Hole Sizes, 9/16 in to 1 in, 1/16 in Step
$20.19
Step Drill Bit, High Speed Steel, Black Oxide, 9/16 in to 1 in Size Range, Straight with Three Flats, 3/8 in Shank Diameter, 2 7/16 in Overall Length, Maximum Drilling Depth 1/8 in