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Precision Drilling for Hard Metals
SPKLINE's 10-piece M35 Cobalt HSS drill bit set is engineered for precision micro hole drilling in demanding materials. Made from industrial-grade High Speed Steel with a 5% cobalt alloy, these bits offer superior heat and abrasion resistance, providing up to 4 times longer life than standard bits on materials like stainless steel, aluminum, plastic, and wood. The 135-degree split-point tip ensures immediate, accurate starts without walking, while the straight shank fits most standard drills and impact drivers.
These professional-grade bits are ideal for tasks requiring fine detail, such as PCB board drilling, IT hardware repairs, jewelry artistry, and processing hard metal parts. For optimal performance and extended bit life when drilling very hard materials or aluminum, use a cutting lubricant or paste and maintain low drilling speeds. Secure your workpiece and clear chips regularly to prevent jamming and ensure clean, precise holes.
While these SPKLINE bits offer enhanced durability for hard metals, they are best suited for DIYers and professionals who own impact drivers or drills with quick-change chucks. For users with only standard keyed chuck drills, ensure compatibility with the 1/4" hex shank. The set is packed in a convenient plastic bag for easy storage and transport.
Engineered for Tough Materials
SPKLINE M35 Cobalt drill bits are crafted for professionals and serious DIYers tackling demanding materials. Unlike standard bits that quickly dull on hardened steel or stainless steel, these bits utilize a high-speed steel base reinforced with 5% cobalt alloy. This composition significantly boosts heat and abrasion resistance, translating to a longer tool life and cleaner cuts. The 135-degree split-point tip is specifically designed to penetrate hard surfaces with less force, preventing the bit from skittering across the material. For those working with aluminum, the enhanced heat dissipation properties of cobalt bits help prevent chip welding, ensuring smoother drilling and better hole quality.
Ideal for Precision Tasks, Not for All Drills
This set is perfect for intricate work like drilling small holes in PCB boards, detailed jewelry making, or precise metal fabrication. However, these bits feature a straight 1/4" hex shank, primarily designed for impact drivers and quick-change chucks. If you primarily use older drills with keyed chucks that only accept round shanks, these bits may not fit securely. While they can drill wood and plastic, their strength lies in harder metals. For very soft metals or general-purpose drilling without an impact driver, consider a different bit type.
Typical situations where SPKLINE 10 Pcs Cobalt Drill Bit Set 1mm-3mm | 135° Split-Point M35 HSS Metal Drill Bits helps — illustrative scenarios, not customer reviews.
A hobbyist in a humid coastal city needs to drill small holes in stainless steel for a custom jewelry project.
SPKLINE's 1mm and 1.5mm cobalt bits are ideal for precise work on stainless steel. The M35 alloy resists heat buildup, crucial in humid environments where standard bits might overheat and dull faster, ensuring clean, accurate holes for intricate designs.
An IT technician needs to drill small pilot holes in aluminum casings for equipment modification.
These SPKLINE cobalt bits, with their 135° split point and heat dissipation properties, are well-suited for drilling aluminum. Using a low speed and cutting lubricant will prevent chip welding and ensure smooth, precise holes for mounting components.
| Base Material | High Speed Steel (HSS) |
| Cobalt Content | 5% M35 Alloy |
| Key Additives | Cobalt Alloy for heat and abrasion resistance |
| Recommended Use | Micro hole drilling in stainless steel, light-gauge metal, high-carbon steel, aluminum, cast iron, hardened steel, PCB boards, plastic, wood. |
| Drilling Speed | Low speed recommended, especially for aluminum and hard metals. |
| Lubrication | Use cutting paste or fluid for drilling hard metals and aluminum to reduce friction and heat. |
| Pressure | Apply light, consistent pressure; let the bit do the work. |
| Chip Clearing | Pull bit out frequently to clear chips and prevent jamming. |
| Shank Fitment | Straight 1/4" hex shank fits impact drivers and quick-change chucks. |
| Safety | Always wear safety goggles and secure workpiece. |
| Cost per use | 10 bits in set — ₹140 per bit |
| Shelf life after opening | 12 months (standard for metal tools, store dry) |
| Feature | SPKLINE 10 Pcs | Others |
|---|---|---|
| Material & Durability | M35 Cobalt HSS with 5% cobalt alloy; heat & abrasion resistant; up to 4x longer life. | Standard HSS or uncoated bits; prone to faster wear and heat damage on hard metals. |
| Hard Metal Performance | Designed for stainless steel, hardened steel, cast iron; excellent heat dissipation. | May struggle or dull quickly on hardened steel; often require frequent cooling. |
| Tip Geometry | 135° split-point tip for self-centering and reduced walking. | Often 118° standard point; prone to skating on hard surfaces. |
| Shank Type | 1/4" Hex Shank for impact drivers and quick-change chucks. | Varies; some may have round shanks not ideal for impact drivers. |
| Cost per bit (approx.) | 10 bits in set — ₹140 per bit | Local HSS bits: ₹20-50/bit; Cobalt bits: ₹50-150+/bit (varies by size & quality) |
| SKU | nkc1754 |
| GTIN | 0784099651991 |
| Brand | SPKLINE |
| Set Name | 10 Pcs High Speed Steel Cobalt Drill Bit Set |
| Material | High Speed Steel with 5% Cobalt Alloy (M35) |
| Shank Type | Straight Shank |
| Shank Diameter | 1/4 inch (3.175 mm) |
| Tip Point Angle | 135-degree Split Point |
| Flute Type | Spiral |
| Finish Type | Uncoated |
| Package Quantity | 10 Pieces |
| Included Sizes (Diameter) | 2x 1mm (3/64"), 2x 1.5mm (1/16"), 2x 2mm (5/64"), 2x 2.5mm (3/32"), 2x 3mm (1/8") |
| Item Weight | 15 grams (approx. per bit) |
| Package Dimensions | 13.4 cm x 8.9 cm x 0.9 cm |
| Country of Origin | Not stated by manufacturer — US retail version, sourced from authorized US retailers and authorized brand partners |
About SPKLINE
SPKLINE specializes in high-performance drill bits and cutting tools, focusing on durability and precision for metalworking and industrial applications.
Compliance & Legal
No product-specific compliance warnings identified. Standard imported-goods terms apply: customs duties & GST paid; for personal use in India; follow the manufacturer's usage instructions on the packaging.
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This item:
SPKLINE 10 Pcs Cobalt Drill Bit Set 1mm-3mm | 135° Split-Point M35 HSS Metal Drill Bits
1,400
This item
SPKLINE 10 Pcs Cobalt Drill Bit Set 1mm-3mm | 135° Split-Point M35 HSS Metal Drill Bits
1,400
Total price:
4,500
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3 items
4,500| Attributes | Current |  |  |  |  |  |  |
|---|---|---|---|---|---|---|---|
| Spec | |||||||
| Price | 1,400 | 1,490 | 1,610 | 1,700 | 6,260 | 6,630 | 3,730 |
| Brand Name | SPKLINE | SPKLINE | SPKLINE | MK Morse | Eagle Abrasives | Rubbermaid | ACCUSHARP |
| Source | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail |
| Sold By | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow |
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