Irwin Tools IRWIN Step Drill Bit, 1/8-Inch to 1/2-Inch Step, 1/4-Inch Shank (10231) Silver|Silver metallic
Details
- MaterialHigh Speed
- Finish TypeBlack Oxide
- Shank TypeRound
- Cutting Angle String118 Degrees
- BrandIRWIN
Description
🔧 Drill Smart, Not Hard!
- 🔄 VERSATILE USE - Ideal for drilling into aluminum, brass, copper, stainless steel, and more.
- ⚡ SPEEDY PERFORMANCE - SpeedPoint tip penetrates faster, eliminating the hassle of walking.
- 📏 EASY IDENTIFICATION - Drill diameters etched in flute for quick and easy size recognition.
- 🛡️ SLIP FREE DESIGN - 3-flatted hex shank prevents slipping in the drill chuck for maximum control.
- 🔍 PRECISION ENGINEERING - Patented single-flute cutting edge ensures true round holes every time.
The Irwin Tools IRWIN Step Drill Bit (10231) is a high-performance tool designed for efficiency and precision. With a range of 1/8-inch to 1/2-inch, this step drill bit features a patented single-flute cutting edge for true round holes, a SpeedPoint tip for faster penetration, and a slip-free 3-flatted hex shank. Perfect for various thin materials, it’s a must-have for any professional toolkit.
Specifications
| Material | High Speed Steel |
| Finish Type | Black Oxide |
| Shank Type | Round |
| Cutting Angle String | 118 Degrees |
| Brand | IRWIN |
| Tool Flute Type | Spiral |
| Minimum Bore Diameter | 13.6 Millimeters |
| Point Style | Step Point |
| Surface Recommendation | Aluminum,Brass,Copper,Metal,Plastic,Stainless Steel,Steel |
| Number of Flutes | 2 |
| UPC | 787721839125 780541552908 038548101019 |
| Unit Count | 1.0 Count |
| Global Trade Identification Number | 00038548101019 |
| Manufacturer | IRWIN |
| Number of Pieces | 1 |
| Part Number | 10231 |
| Item Weight | 1.59 ounces |
| Country of Origin | USA |
| Item model number | 10231 |
| Is Discontinued By Manufacturer | No |
| Size | 1/2 inches |
| Color | Silver|silver Metallic |
| Finish | Black Oxide |
| Shape | Shape |
| Item Package Quantity | 1 |
| Cutting Diameter | 3 Inches |
| Measurement System | Inch |
| Included Components | STEP DRILL #1 1/8-1/2" 13 SZ |
| Batteries Included? | No |
| Batteries Required? | No |
| Assembled Diameter | 3 Inches |
Reviews
R**1
Great to have in your toolbox!
Didn't know these existed til now! Especially useful when having to make a pilot hole first, before drilling a larger hole.
A**1
Great quality and value
It does a clean and professional drill every time and is made of high quality material that doesn’t easily break, also the value was very good
J**G
Center punch needed to get it started.
Did the job, drilling holes in steel edging; the thicker, older stuff. I didn't try it on high speed, but low, using lots of 30W oil and it did cut well....once you got it started. Used a center punch to start the holes, but found that they needed to be deeper before the drill point would catch. Once it caught, it was easy going......with pressure :) Pricey, but worth it for my project.
L**E
Fits in my tool bag just great!
Love this step bit , great for impact !
R**B
You get quality and service life
This is the 3rd Unibit of this size in the last 10 years that I have owned, it is not that it is poorly made, its just that I keep using them. This is the only bit that I have found that I can cut gasket foil, if I do not have a punch that size (requires some trickery). It has many, many uses and I keep finding new ones. I have tried other brands but in this style, of the major brands, this last the longest of the non-impact tapered bits. I have run it at 7,500 rpm without incident and as slow as 2 rpm on 1/8" titanium sheet (prepunched starter hole). The Unibits may seem expensive when compared to HF or other cheap brands but with these you get quality and service life.
Z**G
great for drilling guitar end pin hole
I bought this one to drill an end pin hole on my guitar for pickup installation. It worked flawlessly.
A**R
All good !
All good as described.
B**A
A must!
Very Niiicccce.
Common Questions
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