



🔧 Drill smarter, not harder—unlock precision and speed with every step!
The Irwin 10231 Step Drill Bit offers 13 precise hole sizes from 1/8" to 1/2" in 1/32" increments, eliminating the need to switch bits. Its patented single-flute cutting edge delivers smooth, accurate holes in thin materials like stainless steel, brass, aluminum, and plastic. Featuring a SpeedPoint tip for faster starts and a 3-flat hex shank to prevent slipping, this high-speed steel bit is engineered for professional-grade efficiency and control.


| Material | High Speed Steel (HSS) |
| Cutting Diameter | 12.7 Millimeters |
| Finish Type | Black Oxide |
| Shank Type | Hex 3-flat |
| Cutting Angle String | 118 Degrees |
| Brand | IRWIN |
| Item dimensions L x W x H | 6 x 2.87 x 0.75 inches |
| Tool Flute Type | Spiral |
| Point Style | Step Point |
| Surface Recommendation | Aluminum,Brass,Copper,Metal,Plastic,Stainless Steel,Steel |
| Number of Flutes | 1 |
| UPC | 787721839125 780541552908 038548101019 |
| Set Name | 1/8" to 1/2" 13 SZ |
| Unit Count | 1.0 Count |
| Global Trade Identification Number | 00038548101019 |
| Manufacturer | IRWIN |
| Number of Pieces | 1 |
| Product Dimensions | 6 x 2.87 x 0.75 inches |
| Item Weight | 1.44 ounces |
| Department | Unisex-Adult |
| ASIN | B00004THYX |
| Item model number | 10231 |
| Is Discontinued By Manufacturer | No |
| Date First Available | April 1, 2004 |
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