



🔧 Drill Smart, Not Hard!
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.


| 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 | 
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