8 Best Cobalt Drill Bits Reviews & Buyer’s Guide 2022

When people start new projects, they’ll often put heavy emphasis on drill choice and forget about the importance of drill bits.

The best cobalt drill bits can make a huge difference in how you work. Without quality bits, your drill is practically useless. This is why we’ve decided to rank some of the best options on the market based on different needs.

Best Cobalt Drill Bits Comparison and Review

These cobalt drill bits have made our list for several reasons, including price, durability, and overall usefulness. All of these are designed to work with some of the best cordless drills on the market.

The below reviews, complete with pros and cons, will help you make a decision on which drill bits to buy.

Step Drill Bit Set & Automatic Center Punch 5pcs...
IRWIN Drill Bit Set, M35 Cobalt Steel, 29-Piece...
DEWALT Cobalt Drill Bit Set with Pilot Point,...
BOSCH CO2143 1/4 In. x 4 In. Cobalt Drill Bit
Powerextra Step Drill Bit Set
IRWIN Drill Bit Set
DEWALT DWA1240 Drill Bits
Bosch CO2143 Drill Bits
Material:
High Speed Steel, Titanium
Cobalt
Cobalt
Cobalt
Shank Type:
Hex
Round
Tri-flats
Three-flat
Flute Type:
Two flute
Spiral
-
Spiral
Cutting Angle String:
135-degree
135-degree
135-degree
135-degree
Ideal Use:
Plastic, Aluminum, Copper, Stainless steel
Stainless Steel
Stainless steel, Metals
Metal, Cast iron, Stainless steel and Titanium
Package:
5 pcs
29 pcs
14 pcs
1 pc
Prime:
Step Drill Bit Set & Automatic Center Punch 5pcs...
Powerextra Step Drill Bit Set
Material:
High Speed Steel, Titanium
Shank Type:
Hex
Flute Type:
Two flute
Cutting Angle String:
135-degree
Ideal Use:
Plastic, Aluminum, Copper, Stainless steel
Package:
5 pcs
Prime:
IRWIN Drill Bit Set, M35 Cobalt Steel, 29-Piece...
IRWIN Drill Bit Set
Material:
Cobalt
Shank Type:
Round
Flute Type:
Spiral
Cutting Angle String:
135-degree
Ideal Use:
Stainless Steel
Package:
29 pcs
Prime:
DEWALT Cobalt Drill Bit Set with Pilot Point,...
DEWALT DWA1240 Drill Bits
Material:
Cobalt
Shank Type:
Tri-flats
Flute Type:
-
Cutting Angle String:
135-degree
Ideal Use:
Stainless steel, Metals
Package:
14 pcs
Prime:
BOSCH CO2143 1/4 In. x 4 In. Cobalt Drill Bit
Bosch CO2143 Drill Bits
Material:
Cobalt
Shank Type:
Three-flat
Flute Type:
Spiral
Cutting Angle String:
135-degree
Ideal Use:
Metal, Cast iron, Stainless steel and Titanium
Package:
1 pc
Prime:

8. Best Durable Drill Bits: Stroton Metric M42 8% Cobalt Twist Drill Bits Set

Specification List:
  • Cobalt: M42 8%
  • Design: Three steps
  • Shank Type: Straight
  • Measurement System: Metric
  • RPM: 200 to 1,000
  • Dimensions: ‎7.48 x 5.55 x 1.77 inches
  • Flute Type: ‎‎Spiral
  • Cutting Angle String: ‎‎‎135 degrees
  • Package: 19 pcs
  • Ideal Use: ‎‎‎Stainless steel and hard metal

spiral flute Stroton Metric M42

With a heavy emphasis on durability, the Stroton Metric M42 8% Cobalt Twist Drill Bits Set is a good choice for working with stainless steel and hard metal.

The three-step design allows these cobalt bits to cut through numerous other materials, including plastic and aluminum. Additionally, the sharp bit edge allows you to keep up speed even when drilling through dense objects.

Buyer’s Feedback Section

Last updated: November 8, 2021

Overall Rating 4.5 of 5 Stars 

Positive Feedback
  • They are highly durable and affordable.
  • They work with hard metal, stainless steel, and other materials.
  • The bits’ design makes them less prone to chipping.
  • The drill bit diameter allows these to be used with up to 2,000 RPM.
Negative Feedback
  • Some customers claimed their kit came with missing bits.
  • They can slow down if dealing with thicker materials.

7. Best Affordable Drill Bits: Neiko 01925A Screw Extractor and Left Hand Drill Bit Set

Specification List:
  • Cobalt: M42 8%
  • Shank Type: Threaded
  • Included Components: Screw extractor and left hand drill bit set
  • Dimensions: ‎5.67 x 4.49 x 0.79 inches
  • Flute Type: ‎‎Spiral
  • Package: 10 pcs
  • Ideal Use: ‎‎‎Stainless steel

shank threaded Neiko 01925A drill bit set

Left-handed cobalt drill bits seem to be a rarity, and the Neiko 01925A Screw Extractor and Left Hand Drill Bit Set is among the least expensive on this list.

This set features spiral flutes on extraction bits, which can easily remove broken screws, studs, bolts, and other fittings. They’re primarily intended for use on small projects.

Buyer’s Feedback Section

Last updated: November 8, 2021

Overall Rating 4.5 of 5 Stars 

Positive Feedback
  • They’re a perfect match for smaller projects that one needs to complete in a hurry.
  • The low price means you don’t have to worry about damaging or losing them.
  • These bits are perfect spares to keep around for emergencies.
Negative Feedback
  • Their durability is fairly low, making them highly disposable.
  • They are coated with cobalt instead of being made entirely from cobalt.

6. Best Cheap Drill Bits: Bosch CO2143 1/4 In. x 4 In. Cobalt Drill Bits

Specification List:
  • Shank Type: Three-flat
  • Finish Type: Uncoated
  • Measurement System: Inch
  • Bit type: Twist
  • Flute Type: ‎‎Spiral
  • Cutting Angle String: ‎‎‎135 degrees
  • Ideal Use: ‎‎‎Metal, cast iron, stainless steel and titanium

uncoated Bosch CO2143 cobalt drill bits

The Bosch CO2143 1/4 In. x 4 In. Cobalt Drill Bits have made our list in large part due to their excellent price.

These are some of the less expensive options that you might find both online and in hardware stores.

However, the price also tends to reflect the set’s overall usability. These drill bits won’t last nearly as long as others on this list. However, they’re an excellent choice for a quick repair job.

Buyer’s Feedback Section

Last updated: November 8, 2021

Overall Rating 4.6 of 5 Stars 

Positive Feedback
  • They stand up surprisingly well when used on metal.
  • The set can withstand temperatures that most people would assume only higher-priced bits can take–up to around 1,100 degrees F.
  • Each bit can cut even through angled iron.
  • The price is an absolute bargain.
Negative Feedback
  • Your expectations should be as low as the price.
  • They handle hard metal, but you should consider upgrading to other bits at a certain density point.

5. Best Industrial-Grade Drill Bits: IRWIN Industrial Tools 316015 Cobalt Drill Bits

Specification List:
  • Shank Type: Three-flat
  • Finish Type: Black oxide
  • Bit type: Twist
  • Chuck Size: 3/8 inch
  • Cutting Diameter: ‎0.0625/0.09375/0.109375/0.25 inch
  • Dimensions: ‎10.25 x 10.94 x 11.06 inches
  • Cutting Angle String: ‎‎‎135 degrees
  • Package: 15 pcs

black oxide Irwin 316015 cobalt drill bits

The IRWIN 316015 Cobalt Drill Bits instantly showcase a higher level of quality.

They’re presented cleanly in an organized manner that helps you instantly choose the right bit for a job.

Their design allows them to be used with harder than standard materials, and reduced shanks above 3/8″ allows the use of larger drill bits in a 3/8″ chuck.

Buyer’s Feedback Section

Last updated: November 8, 2021

Overall Rating 4.7 of 5 Stars 

Positive Feedback
  • It’s easily among the best cobalt drill bits set for more professional-grade projects.
  • The bits are made of high-quality cobalt steel.
  • They have designs intended for resharpening at a later date.
  • Their reduced shanks allow for use of larger drill bits in a 3/8″ chuck.
Negative Feedback
  • They tend to walk on harder projects.
  • Their speed reduces when cutting through steel.

4. Best Reliable Drill Bits: DEWALT DWA1240 Pilot Point Industrial Cobalt Drill Bits

Specification List:
  • Cobalt: M35 5%
  • Shank Type: Three-flat
  • Measurement System: Metric
  • Dimensions: ‎8.75 x 1.74 x 8.75 inches
  • Cutting Angle String: ‎‎‎135 degrees
  • Package: 14 pcs
  • Ideal Use: Stainless steel, metal

three-flat shank DeWalt DWA1240 drill bits

DEWALT’s DWA1240 Pilot Point Industrial Cobalt Drill Bits are one of the best choices from this reliable brand.

These bits can be used on denser materials. Additionally they combine that capability with higher supported speed and user control.

Buyer’s Feedback Section

Last updated: November 8, 2021

Overall Rating 4.6 of 5 Stars 

Positive Feedback
  • The set is designed to work and maintain itself under rough usage conditions.
  • It supports both a pilot point and split tip design.
  • The bits can easily drill through thick materials.
  • The case is sturdy and well organized.
Negative Feedback
  • They can heat up quickly if used for hours on end.
  • This kit does not have a 1/2″ bit.

3. Best Sized Drill Bits: CO-Z 5pcs HSS Cobalt Multiple Hole 50 Sizes Step Drill Bit

Specification List:
  • Design: Two-fluted
  • Shank Type: Tri-faced
  • Finish Type: Titanium
  • Measurement System: ‎Inch
  • Chuck Sizes: 1/4, 3/8, and 1/2 inch
  • Dimensions: 4.33 x 1.57 x 6.1 inches
  • Flute Type: ‎‎Spiral
  • Package: 5 pcs
  • Ideal Use: ‎‎‎Steel, aluminum, wood, plastic

titanium finish CO-Z hss cobalt drill bits

The CO-Z Cobalt Drill Bits offer compatibility with 1/4″, 3/8″, and 1/2″ chuck sizes.

Their non-walking drill tips provide fast and smooth drills on steel sheets, aluminum sheets, wood boards, plastic boards, and numerous other materials that you might need to work with as a professional driller.

Buyer’s Feedback Section

Last updated: November 8, 2021

Overall Rating 4.5 of 5 Stars 

Positive Feedback
  • They’re a solid choice for somewhat larger projects.
  • They work well on plastic, but not quite as well on non-ferrous materials.
  • Different sized shanks ensure compatibility with 1/4″, 3/8″, and 1/2″ chuck sizes.
Negative Feedback
  • The overall durability is a little less than you might hope for the price.
  • Long-term use with heavier materials might dull the bits at a faster rate than expected.

2. Best Value Drill Bits: IRWIN Drill Bit Set, M35 Cobalt Steel, 29-Piece (3018002)

Specification List:
  • Cobalt: 5%
  • Shank Type: Round
  • Measurement System: Inch
  • Dimensions: ‎12 x 7.5 x 4 inches
  • Flute Type: ‎‎Spiral
  • Cutting Angle String: ‎‎‎135 degrees
  • Package: 29 pcs
  • Ideal Use: ‎‎‎Stainless steel

round shank Irwin 3018002 drill bit set

The IRWIN Cobalt Drill Bit Set covers sizes from 1/16″ to 1/2″.

Each of the bits has a 1/64″ split. This top-of-the-line cobalt drill bit set comes with heavy-duty web construction for added strength and durability.

This set is a phenomenal choice for working with stainless steel. The larger bits are three-flat spot cut, and the smaller ones are round cut, which gives you versatility when drilling complex projects.

Buyer’s Feedback Section

Last updated: November 8, 2021

Overall Rating 4.7 of 5 Stars 

Positive Feedback
  • These bits are meant to last longer than other options currently on the market.
  • The included case provides easy organization and on-the-fly selection.
  • Their overall durability is further guaranteed thanks to their web construction and cobalt bases.
  • They cut smoothly through dense materials.
Negative Feedback
  • The price is higher than other options on the market.
  • There is no hex or flatted shank included.

1. Best Quality Drill Bits: Powerextra Step Drill Bit Set & Automatic Center Punch 5pcs HSS Cobalt Titanium

Specification List:
  • Design: X-shape
  • Shank Type: Hex
  • Chuck Sizes: 1/4, 3/8, and 1/2 inch
  • Finish Type: Titanium
  • Measurement System: Inch
  • Dimensions: ‎5.9 x 5.1 x 1.5 inches
  • Flute Type: ‎‎Two flute
  • Cutting Angle String: ‎‎‎135 degrees
  • Package: 5 pcs
  • Ideal Use: ‎‎‎Plastic, aluminum, copper, stainless steel

hex shank Powerextra hss cobalt drill bits

Some of the best cobalt drill bits take into account different shapes and sizes; the Powerextra Step Drill Bit Set’s HSS step design allows for a single bit design to cover more ranges.

It essentially means that you can cover around five standard hole measurements with the use of a single drill bit. The titanium coating protects these reliable cobalt drill bits from rust.

The center punch reduces wobbling and allows for easier targeting of the exact spot that you want to drill in. With these bits’ flexibility, you’ll have no problem covering a multitude of projects that require different sized holes.

Buyer’s Feedback Section

Last updated: November 8, 2021

Overall Rating 4.5 of 5 Stars 

Positive Feedback
  • The bits offer a greater range of use, better speeds, and overall better user experience.
  • The price point is surprisingly low given the amount of innovation it provides.
  • Their X-shape blade designs enables faster and smoother cutting.
Negative Feedback
  • The set doesn’t last as long as others if used on stainless steel.
  • It takes a while for beginners to get used to the multi-step design.

Final thoughts

The PowerextraStep Drill Bit Set earned first place on our list because of some innovative design choices.

However, ranking the best cobalt drill bits is subjective. Different jobs and styles call for different drill bit sets.

Sometimes you may need a durable drill bit that will last for years. Other times, a disposable option is a good choice. Whatever your needs may be, know you have some excellent cobalt drill bits to choose from.

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