Twelve hole sizes from 3/16-inch to 7/8-inch are covered by this step drill bit, coated in aluminum titanium nitride for roughly 10 times the bit life of a standard black-oxide coating.
- Sizes: 3/16-inch to 7/8-inch, 12 steps
- Coating: aluminum titanium nitride (about 10x more durable than steamed black oxide)
- Shank: 3/8-inch hex, won't spin out in the drill
- Materials: steel up to 16 gauge, wood, plastic, aluminum
- Laser-marked sizes; fast-starting, non-walking tip
Best for: drilling a range of hole sizes in sheet metal, wood, plastic, or aluminum with one bit instead of swapping through a set.