Best Cobalt Drill Bits In September 2026

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Looking for the Best Cobalt Drill Bits that can last long and perform well? Read our review and buying guide on Best Cobalt Drill Bits below.

To help you in your search, we have completed this list of the Best Cobalt Drill Bits.

Top Rated Best Cobalt Drill Bits Of 2026

Rank	Product Name	Score
1	COMOWARE Cobalt Drill Bit Set- 15Pcs M35 High Speed Steel Twist Jobber Length Buy Now	9.7 Buy Now
2	amoolo Cobalt Drill Bit Set (13 pcs), M35 HSS Metal Drill Bits Buy Now	9.5 Buy Now
3	Hymnorq Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bits with Straight Buy Now	9.1 Buy Now
4	Bosch CO14B 14 Pc. Cobalt M42 Drill Bit Set Buy Now	8.8 Buy Now
5	Hymnorq Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bits with Straight Buy Now	8.6 Buy Now
6	DEWALT Cobalt Drill Bit Set with Pilot Point, 14-Piece (DWA1240) Buy Now	8.3 Buy Now
7	DEWALT Titanium Drill Bit Set, 21-Piece (DW1342) Buy Now	8.1 Buy Now
8	CO-Z 5pcs Hss Cobalt Multiple Hole 50 Sizes Step Drill Bit Set Buy Now	7.8 Buy Now
9	Bosch CO2143 1/4 In. x 4 In. Cobalt Drill Bit Buy Now	7.5 Buy Now
10	DEWALT DWA1206 3/32" Pilot Point Industrial Cobalt Drill Bit Buy Now	7.2 Buy Now

1. COMOWARE Cobalt Drill Bit Set- 15Pcs M35 High Speed Steel Twist Jobber Length

• Professional & widely use: m35 cobalt hss is more suitable for hardened material. particularly successful in cutting through hard metals such as stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics and woods, and also can be used for softer materials.
• Size included: 15pcs jobber length drill bit set with plastic storage case including sizes:1/16" 2pc,5/64" 1pc ,3/32" 2pc,7/64" 1pc,1/8" 2pc ,9/64" 1pc, 5/32" 1pc, 3/16" 1pc, 7/32" 1pc, 1/4" 1pc, 5/16" 1pc, 3/8" 1pc.
• 100% satisfaction guarantee: if you are not 100% satisfied with your purchase for any reason whatsoever simply please feel free to contact us.
• High quality material: 5% cobalt high speed steel m35 provide extended tool life compared to ordinary drill bits. durable and strong
• Twist design & performance: precise 135split point, gold oxide finish and round straight shanks. prevent walking, clear chips and particles faster.produced by precision fully ground which ensures chips move smoothly.

2. amoolo Cobalt Drill Bit Set (13 pcs), M35 HSS Metal Drill Bits

• 90 days warrantyif you are not fully satisfied for any reason, please contact us for 100% refund or replacement.
• Fully ground process & 135 split pointfully ground spiral groove design clears particles quickly, decreases friction and heat for a faster and cooler drilling performance. 135 split point with straight shank prevents walking and makes drilling precise and faster. no center punch is needed.
• Combo set of 13 sizes13 most commonly-used sizes (1/16",5/64",3/32",7/64",1/8",9/64",5/32",11/64",3/16",13/64",7/32",15/64",1/4") to satisfy all your needs. this drill bits set fits the majority of power drill currently on the market and come with a portable plastic bag for easy storage and organization.
• Multiple applicationperfectly suitable for cutting hard metal such as stainless steel, steel and cast iron as well as wood, aluminum alloy and other softer metals. not for glass or ceramic materials. not for high carbon steel and heat-treated steel. pay attention to speed, pressure and heat control during drilling.
• M35 cobalt high speed steelindustry grade 6542 high speed steel drill bit set, harder than 4241 hss used in other similar drill bits set. these drill bits also contain 5% cobalt, which increases wear-resistance and durability.

3. Hymnorq Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bits with Straight

• Downloadable user guide - we've summed up some tips of drilling metals, including a rpm chart for several common metals, based on our reviews and some articles on the internet. in most cases, our customers would get a much better result with these tips. welcome to download.
• Cobalt steel - manufactured from m35 cobalt steel, with molybdenum and cobalt added to creates a hardened alloy, measuring rockwell hardness up to 67, extremely heat resistant, for much faster cutting and extra longer life span, with up to twelve times when compared with an average hss drill bit.
• No center punch needed - the 135 quick-cut points are self-centering and penetrate quickly with less pressure. will not "walk" or "wander". straight shank allows for firmly holding and accurate centering, fit for standard drill chucks and regular round collet chucks. must be used and operated at proper rpms for maximum efficiency
• For metalworking - particularly successful in cutting through hard metals such as stainless steel and cast iron, although they can be used for softer materials, too. not for hardened steel / high carbon steel. try to adjust the rpm when it fails to penetrate.
• 13pc metric bits - the set includes 13pcs of m35 cobalt steel twist drill bits: 1.5mm, 2mm, 2.5mm, 3mm, 3.2mm, 3.5mm, 4mm, 4.5mm, 4.8mm, 5mm, 5.5mm, 6mm, 6.5mm. well organized in a plastic indexed storage case for easy transport to your worksite.

4. Bosch CO14B 14 Pc. Cobalt M42 Drill Bit Set

• Cobalt m42 drill bit provides upgraded m42 cobalt jobber-length bits designed for durability, high heat resistance and hardened surface for stainless steel, cast iron, titanium, light-gauge metal and aluminum
• High-heat resistant bits withstand high-temperature applications for extended periods of time
• Surface-hardened tip penetrates tough abrasive materials
• Enhanced m42 alloy material contains 8% cobalt alloy that delivers 10x life vs. standard bits
• Thick web-helix design provides additional stability in tough applications

5. Hymnorq Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bits with Straight

• 50pc set - the set includes 50pcs of metric m35 cobalt steel twist drill bits: 1mm, 1.5mm, 2mm, 2.5mm, 3mm. 10 each metric drills in popular hobbyist sizes at low price. manufactured to german din338 standard. packed in a plastic bag. these bits are quite small. please refer to the picture including a size chart.
• Downloadable user guide - we've summed up some tips of drilling metals, including a rpm chart for several common metals, based on our reviews and some articles on the internet. in most cases, our customers would get a much better result with these tips. welcome to download.
• For stainless steel - particularly successful in cutting through hard metals such as stainless steel and cast iron, although they can be used for softer materials, too. not for hardened steel / high carbon steel. try to adjust the rpm when it fails to penetrate.
• M35 cobalt steel - manufactured from m35 cobalt steel, with molybdenum and cobalt added to creates a hardened alloy, measuring rockwell hardness up to 67, for much faster cutting and extra longer life span, with up to twelve times when compared with an average hss drill bit.
• Point angle - the 3mm bits are 135 split pointed, which is self-centering and will penetrate quickly with less pressure. will not "walk" or "wander". the other small ones are 118.

6. DEWALT Cobalt Drill Bit Set with Pilot Point, 14-Piece (DWA1240)

• Intended to be used on hard metals
• Pilot point and split tip design
• Designed for maximum speed and life
• No bit walking - more user control

7. DEWALT Titanium Drill Bit Set, 21-Piece (DW1342)

• Includes tough case container to keep bits organized
• Bit case may differ from what is shown
• No spin shanks
• Titanium coating for longer life
• Ideal for drilling in metal, wood, and plastics
• Speed tip reduces walking

8. CO-Z 5pcs Hss Cobalt Multiple Hole 50 Sizes Step Drill Bit Set

• Please mark the spot that you are to drill for easier drilling and improved drill bits life.
• All the bits come in a well-organized case for easy transport and storage.
• Different sized shanks ensure compatibility with 1/4, 3/8 and 1/2 in. chuck sizes.
• Cobalt high speed steel along with the titanium coating ensures extreme durability, will stay new and shiny for years to come.
• Non-walking drill tip provides fast and smooth drills on steel sheets, aluminum sheets, wood board, plastic board etc. (the board must be smaller in thickness than the height of step drill bits).

9. Bosch CO2143 1/4 In. x 4 In. Cobalt Drill Bit

• Surface hardened to penetrate tough abrasive materials
• Withstands high-temperature applications for extended periods of time (up to 1,100 degreef)
• Rigid, thick web design adds stability to bit in tough applications
• Available in jobber length, full shank
• Best used for drilling into light-gauge metal, high-carbon steel, aluminum and ally steel, cast iron, stainless steel and titanium

10. DEWALT DWA1206 3/32" Pilot Point Industrial Cobalt Drill Bit

• No bit walking - more user control
• Designed for maximum speed and life
• Pilot point and split tip design
• Intended to be used on hard metals