Step Drill Bit #15 Double Fluted 7/8 to 1-3/8-Inch, Two flutes on | Crescent Electric Supply Company
NEIKO 10197A Step Drill Bit Set, 5 Pc Step Bit for Metal, 50 SAE Sizes Total, 1/8” – 1-3/8”, SAE Titanium High Speed Steel Unibit, Stepper Cone Drill Bit, Two Flute Step
Non-standard Two-level Countersunk Head Step Drill Bit For Screw Counterbore - Buy Countersunk Head Drill Bit,Step Drill Bit,Screw Counterbore Step Drill Product on Alibaba.com