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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Wednesday, Oct 28
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At a glance
- Condition
- New
- Size
- 1/4" - 2-1/2"
- Model
- TA01029001
- Material
- High Speed Steel (HSS)
- Cutting Diameter
- 2-1/2 in
- Finish Type
- Titanium Aluminum Nitride
- Shank Type
- Tri-Flat
- In the box
- 1PC 1/4" - 2-1/2" STEP DRILL BIT
- Warranty
- 90 days warranty of free replacement or refund
Features 5
- WARRANTY - If you are not fully satisfied for any reason, please contact us for 100% refund or replacement.
- STREAMLINED SIZE TRANSITION - Guarantees true smooth drilling of large holes.
- TiAlN COATING- With 89HRC surface hardness, harder materials can be cut and higher cutting speeds can be achieved.
- HSS STEP DRILL - Prefect for Metal Sheet/Wood/Plastic/Aluminum Sheet/Copper and other metal sheets.
- DIMENSION - Includes 15 STEPS SIZE from 1/4" to 2-1/2". Replace a whole set of hole saw. No more suffering from drilling large holes
Specs 21
| Material | High Speed Steel (HSS) |
|---|---|
| Cutting Diameter | 2-1/2 inches |
| Finish Type | Titanium Aluminum Nitride |
| Shank Type | Tri-Flat |
| Cutting Angle String | 118 degrees |
| Brand Name | AugTouf |
| Model | TA01029001 |
| Item Highlight | M35 Cobalt HSS; TiAlN Coating; Large Diameter Unibit; Four Spiral Flutes; Metal/Stainless/Aluminum/Plastic; 1/2" Shank |
| Set Name | Gigantic Step Drill Bit |
| Unit Count | 1 Count |
| Number of Packs | 1 |
| Manufacturer | AugTouf |
| Part Number | TA01029001 |
| Number of Pieces | 1 |
| Minimum Bore Diameter | 0.25 inches |
| Material Type | High Speed Steel (HSS) |
| Finish Types | Titanium Aluminum Nitride |
| Surface Recommendation | Metal, Plastic, Wood |
| Tool Flute Type | Spiral |
| Point Style | Step Point |
| Number of Flutes | 2 |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Oct 28
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Ridiculously and funny large but exactly what I needed – excellent quality and practical packaging
Size: 1/4" - 2-1/2"
This toolant Large Diameter Step Drill Bit (1/4"–2-1/2", TiAlN, M35 Cobalt HSS, 1/2" shank) is genuinely oversized and almost comically big when you first pull it out of the package, but it was precisely the size I needed for my project. The quality is outstanding — the M35 cobalt steel with TiAlN coating feels premium, the four spiral flutes cut cleanly, and the overall machining and finish are excellent. It performs very well on metal and sheet materials as intended. When I tested it in thicker wood (not its primary purpose), it still cut effectively, but you will want a drill with solid torque and control because of the large diameter and the amount of material being removed. Once you have the right power tool behind it, the bit handles the job smoothly. The packaging is also practical and protective, which is appreciated for a tool of this size and value. Overall, this is a high-quality, specialized bit that does exactly what it claims. I’m glad I bought it and would recommend it to anyone who specifically needs a large-diameter step drill of this caliber.
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Reviewed in the United States on August 14, 2026 by Carlos Garcia
Toughest unibit I've ever used, update 8 months later
Size: 1/8" - 1/2"
I am in the automotive electronics industry. I have used different types and brands of step bits for the last 20 years. Most of them turn to garbage after drilling through semi thick metal once or twice. And it ruins the tip. I have only used this new one on types of plastic and twice on sheet metal in the body of a vehicle. So far this bit works better than any I have ever used. It is so sharp you must be careful using it on plastic because it will cut a hole bigger than you want very quickly if you're not careful. I hope I have success in keeping it sharp using it on metal. Here's update on review. I have now used this bit drilling through multiple metal panels on automobiles. I have not had one issue with this product darling or causing me any problems. I don't know how it will do drilling through 8 inch solid steel but through body panels and floor panels on cars it does exceptionally well. . Here's an update from the middle of July 2023. This bit is really rugged. It will drill through 8 inch to quarter inch solid steel on a truck steak bed. I drilled the pilot hole with an 8 inch bit and used it to make the hole up to a 3/8. This bit is extremely Sharp and extremely brittle. I advise spraying silicone on it and keep your drill moving slowly watching it peel the metal. When you're going to that slow speed with this bit it works wonders. It's amazing. But I usually use it for thin metal in vehicles and it has no problem whatsoever. It gets seven Stars as far as I'm concerned. But be careful it is brutal when you are drilling big holes it can hang up and snap.
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Reviewed in the United States on December 23, 2022 by J. Trenthem
Quality bit!
Size: 1/4" - 1-1/8"
Far exceeded my expectations considering it's price point. I used it to bore fourteen 1-1/8" holes through 11 gauge steel and it produced very clean and true results (see my photos for reference). Run it on a drill press, low RPM, with sufficient oil and only gentle pressure. A light press/release/repeat rythym. Good tool, good price, good purchase!
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Reviewed in the United States on September 9, 2026 by S in TX
Works like its supposed to
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So far so good!
Reviewed in the United States on October 2, 2026 by David Furderer
Very sharp
Size: 1/4" - 2-1/2"
Very nice tool. It was very sharp. Worked like butter.
Reviewed in the United States on October 1, 2026 by Coy H.
Absolutely best bits I own
Size: 1/8" - 7/8" (3pcs Set)
These relatively inexpensive bits outperform very high dollar carbide machinist bits, and other much more expensive cobalt bits. The cut so fast that the material barely has any chance to get hot which makes them last forever. I've been using them not for several months and I am very sincerely impressed. It's really hard to trust sellers these days. I think I paid 60 bucks to try them in my body shop just as a chance they might work on the lighter sheet metal and they performed so well and lasted so long I have started using them in my machine shop. They are suitable for cutting harder than mild steel, alloys and stainless with no issue whatsoever. I cannot speak highly enough of how surprised and utterly impressed I am with the performance. The most surprising part is the cost! They are the cheapest bits I own and they are also the best drill bits I own! I'm putting together a list to start replacing my professional machinist quality drill bits with these as they go bad and dull. They cost less than sharpening my bits and I have yet to dull any of these as of yet. Very surprised, impressed, and happy with them! I wish more things were like this. I'm happy I took a chance and bought these taking a low risk chance that had really taught me a wonderful lesson.
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Reviewed in the United States on September 12, 2024 by Chisty Rich
Drills through steel at high speed
Size: 1/4" - 3/4"
My husband used this to drill holes into 1/8” diamond plate steel and was completely impressed. Using cutting oil he was able to cut right through at high speed with no issues. A couple of points regarding some of the issues people had: he inserted the shaft nearly all the way into the drill to give it extra support and made sure to keep the drill absolutely straight the whole time. He did mention that it tried to hand up a couple of times, but he just stopped and restarted with no problem. It has such bite that it really wants to turn on an angle which is probably where people run into trouble with the shaft breaking. Overall, he’s thrilled with this bit
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Reviewed in the United States on October 26, 2023 by Angela
Pretty good with a caveat
Size: 1/8" - 7/8" (3pcs Set)
Purchased 3 years ago, the unibits I have owned. Aggressive and maintain sharpness except for the pilot tip that dulls quickly. I work around this by predrilling a small hole with a regular drill bit first. Note I recently broke one where the shaft gave up on a non-impact drill A 1/2" shaft would be better, makes me wonder how these are "impact rated". I will be replacing the broken one with the same brand.
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Reviewed in the United States on March 1, 2026 by Gern