3PCS Cobalt Step Drill Bit Set for Stainless Steel & Hard Metal,M35 HSS Unibit with TiAlN Coating,Spiral Flute Design,1/8"-1/2", 1/4"-3/4", 3/16"-7/8" for Iron, Aluminum, and Alloy Drilling
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$28.99
Price when purchased online
Free shipping
Free 30-day returns
Sold and shipped by bellarometravelworldwide.com
Free 30-day returns Details
Product details
| Management number | 218148457 | Release Date | 2026/05/03 | List Price | $11.60 | Model Number | 218148457 | ||
|---|---|---|---|---|---|---|---|---|---|
| Category | |||||||||
- 【Premium M35 Cobalt Construction】 Engineered from industrial-grade M35 cobalt high-speed steel with a TiAlN coating, these step drill bits deliver exceptional hardness, heat resistance, and cutting performance. Designed to stay sharper longer—ideal for drilling through stainless steel, iron, aluminum, and other tough metals.
- 【Superior Cutting Efficiency】 Each bit is heat-treated and hardened to 64–67 HRC, ensuring precise, burr-free holes even in hard materials. The spiral flute design promotes smooth chip evacuation, reduces friction, and prevents clogging for faster, cleaner drilling.
- 【Wide Size Range & Compatibility】 Includes three step drill bits covering a range from 1/8" to 7/8" (1/8"-1/2", 1/4"-3/4", and 3/16"-7/8"), suitable for hole enlargement or new drilling. Compatible with drill presses, milling machines, and cordless drills—perfect for professionals and DIY metalworkers alike.
- 【Maximize Tool Life with Proper Use】 For optimal performance, use cooling oil and maintain a low drill speed (250–400 RPM) when cutting metal. Avoid using impact drivers to prevent uneven torque and premature wear—ensuring your bits last longer and perform consistently.
| Set Name | 3PCS-Cobalt Step Drill Bit Set |
|---|---|
| Brand Name | ColumPRO |
| Shank Type | 3-Flat |
| Unit Count | 3.0 Count |
| Part Number | O120-3PCS SAE |
| Finish Types | Titanium Aluminum Nitride |
| Manufacturer | ColumPRO |
| Material Type | M35 High-Speed Steel |
| Tool Flute Type | Spiral |
| Number of Flutes | 3 |
| Number of Pieces | 3 |
| Surface Recommendation | Aluminum, Iron, Stainless Steel |
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