Crosstar Cobalt Stepped Point Drill Bit Set-21pcs 1/16"-1/2" TiAlN Coated Step Drill Head,M35 HSS Jobber Bits,No Pre-Drilling,3-Flat Shank,with Indexed Storage Case,Precise Drilling,for Hardened Steel
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Product details
| Management number | 215637128 | Release Date | 2026/04/12 | List Price | $20.00 | Model Number | 215637128 | ||
|---|---|---|---|---|---|---|---|---|---|
| Category | |||||||||
- 【21-Piece M35 Cobalt Steel Drill Bit Set: Targeted for Hard Metals】Crafted from premium M35 cobalt steel with 5% cobalt core, this drill bit set is engineered to tackle tough metals ranging from 30–60 HRC hardness. It delivers superior drilling performance on stainless steel, high-temperature alloy steel, and bearing steel, outperforming ordinary high-speed steel bits on hard materials.
- 【135° Step Drill Head: 50% Faster, No Pre-Drilling Needed】Boasting a 135° split-point step design, this drill bit enables instant, accurate starting—even on curved surfaces. The stepped structure delivers rounder, smoother holes and allows easy hole enlargement on existing openings. The tri-flat shank locks securely in chucks for stable, wobble-free drilling.
- 【Exclusive TiAlN Nano Coating】Unlike the mainstream oxide, blued, or yellow-baked coatings on the market, our drill bits feature an exclusive high-performance TiAlN nano coating. Boasting 1400°F heat resistance and 6x enhanced durability, this unique coating solution outshines competitors and delivers unmatched drilling performance for tough tasks.
- 【Superior Shockproof Case】Our premium shockproof case is attractive, shatter-resistant and effectively solves the common issues of flimsy plastic boxes that break easily and iron boxes that tend to rust; each drill body is marked with laser-etched size labels for quick access, and the 21-piece set comes with practical popular sizes for secure storage and hassle-free use.
- 【Usage Tips + Guarantee】 Apply steady vertical pressure during operation (do not twist the drill bit) and match the rotational speed to the bit size for optimal performance: 1/16–9/64 inch bits recommended at 1260rpm; 5/32–1/4 inch bits at 740rpm; 5/16–1/2 inch bits at 290rpm. if any quality issues arise during use, please contact us promptly—we will make every effort to resolve the problem and ensure your satisfactory shopping experience.
| Size | Jobber Bits |
|---|---|
| Color | Black-orange |
| Material | M35 cobalt HSS |
| Item Weight | 1.12 pounds |
| Part Number | CST-JTTMHZ |
| Manufacturer | Crosstar |
| Item model number | CST-JTTMHZ |
| Batteries Included | No |
| Batteries Required | No |
| Package Dimensions | 7.2 x 4.29 x 2.17 inches |
| Included Components | 1/16"(*2) | 5/64"(*2) | 3/32"(*2) | 7/64"(*2) | 1/8"(*2) | 9/64" | 5/32" | 11/64" | 3/16" | 13/64" | 7/32" | 15/64" | 1/4" | 5/16" | 3/8" | 1/2" |
| Item Package Quantity | 1 |
Jobber Drill Bits
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