IRWIN 10234cb Step Drill Bit, 12 Hole Sizes, 3/16 in to 7/8 in, 1/16 Step
$42.99
Step Drill Bit, Cobalt, Black Oxide, 3/16 in to 7/8 in Size Range, Straight with Three Flats, 3/8 in Shank Diameter, 2 7/8 in Overall Length, Maximum Drilling Depth 1/8 in