Step-Drill Bit- 4241 High Speed Steel Bits Cut Faster, Stay Cooler and Last Longer- Sizes 1/4 to 1 3/8 -Typhon East

4241 High-Speed Steel Step-Drill Bit - withstand higher temps without losing its hardness which last longer than standard carbon bits. Sizes 1/4 to 1

Best Drill Bits for Metal for 2024 - Pro Tool Reviews

Spiral Step Bit, #4, 3/16 - 7/8

Aluminum Case Metal Core Drill Bit Tool – NovoDealShop

Preamer Set of 3 HSS6542 M2 Steel Spiral Groove Step Drill Bit Set for Stainless Steel Metal Wood Hole

NINDEJIN Metric Step Drill Bit Set 4-32mm HSS Hex Shank Titanium

step drill - Best Prices and Online Promos - Apr 2024

Spiral Step Bit Kit

1/8 X 3.5 SHOCKWAVE™ Carbide Multi-Material Drill Bits

IRWIN Step Drill Bit, 3/16-Inch to 7/8-Inch, 3/8-Inch Shank (10234)

Step Drill Bit Set Metric 3PCS with Bag, Automatic

These Double-Fluted Step Drill Bits provide faster cutting and drilling than single flute bits. The easy-to-read step markings and targets save time when drilling holes. Thick 3/8'' hex shank provides a firm, positive grip and won't spin out in the drill.

Klein Tools KTSB01 Step Drill Bit #1 Double-Fluted