Attributes

Brand	-
Category	Root / Home Furniture
Origin	-
Material	High-Speed Steel with 5% Cobalt Alloy
Surface Finish	Black Oxide Coated for Heat Resistance
Shank Type	Triple-Flat Quick Change Shank
Point Angle	135 Degrees Split Point
Step Count	9 Precision Ground Steps
Hole Size Range	4mm to 20mm (5/32" to 25/32")
Compatibility	Fits Standard Cordless and Corded Drills
Application	Ideal for Stainless Steel, Iron, and Wood
Package Includes	1x Serrated Step Drill Bit and Storage Case
Warranty	1-Year Manufacturer Defect Warranty

6 reviews

Anonymous

Mar 13, 2026

Rating: 5/5

Sharp and durable

I've used cheaper step bits before that dulled after one job. This cobalt alloy bit is still razor sharp after drilling into hard alloy brackets. Highly recommend.

Anonymous

Mar 12, 2026

Rating: 5/5

Cuts through stainless steel like butter

I was skeptical about the cobalt claim, but this bit drilled through my stainless steel sink fixture without walking or overheating. The serrated edges really help chip away the metal smoothly.

Anonymous

Mar 11, 2026

Rating: 5/5

No more pilot holes needed

The split point design is fantastic. I didn't need to punch a pilot hole; the bit centered itself immediately. Saved me a ton of time on my workshop organization project.

Anonymous

Mar 10, 2026

Rating: 4/5

Great value for DIY projects

Used this to enlarge holes in my aluminum shelving units. It worked perfectly for the first 15 holes. Just make sure to use cutting oil to extend its life.

Anonymous

Mar 07, 2026

Rating: 4/5

Good but requires steady pressure

Works well overall. You do need to apply consistent pressure to keep it from grabbing too aggressively on thin sheet metal. Once I got the rhythm, it was smooth sailing.

Anonymous

Mar 06, 2026

Rating: 5/5

Perfect for furniture assembly modifications

Had to modify some metal bracket holes for a custom furniture build. This bit made clean, burr-free holes every time. The black coating seems to reduce friction significantly.

5 FAQ

Q: What is the maximum thickness of metal this can drill?

A: While it depends on the specific alloy, this bit performs best on metal sheets up to 4mm thick. For thicker materials, we recommend peck drilling.

Q: Do I need to use lubricant when drilling?

A: Using cutting oil or lubricant is highly recommended, especially when working with stainless steel or hard alloys, to prevent overheating and extend the bit's lifespan.

Q: Can this drill bit be used on cast iron?

A: Yes, the cobalt alloy construction makes it suitable for drilling into cast iron, stainless steel, and other hard metals.

Q: Is the shank compatible with impact drivers?

A: The triple-flat shank is designed for standard drill chucks. While it can fit in some impact drivers, we recommend using a standard variable speed drill for best results and longevity.

Q: Does this come with a storage case?

A: Yes, the package includes a durable plastic storage case to keep the bit protected and organized when not in use.

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