10 Best cobalt drill bits of 2025

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1

Drill America
Drill America - DWD29J-CO-PC 29 Piece M35 Cobalt Drill Bit Set in Round Case (1/16" - 1/2" X 64ths), DWDCO Series
Main highlights

Extended Tool Life with Cobalt Steel
Cobalt steel construction ensures durability and longevity when drilling hard materials.

Ideal for Drilling Hard Materials
Perfect for drilling through hardened steel with ease and precision.

Effortless Steel Drilling Performance
Customers praise the bits for cutting through steel like butter.
9.8

Exceptional

Our Rating

8.2
lasts a long time

8.2
worth the money

8.0
Durability
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Value for Money

2

Sinyeenglon
Sinyeenglon Cobalt Drill Bit Set for Hardened Metal and Stainless Steel, 99Pcs M35 High Speed Steel Twist Jobber Metal Drill Bits 1/16"-3/8", with Plastic Index Storage Case
Main highlights

Durable and Efficient
Cobalt M35 material offers superior hardness, cutting speed, and longevity, lasting up to 12 times longer than average HSS bits.

Versatile Applications
Ideal for drilling stainless steel, cast iron, titanium, aluminum, and other hard metals.

Organized Storage
Plastic case with labeled compartments for easy access and organization.
Key specs
- Size:99pcs
- Material:Cobalt M35
- Point Design:Hardened Full Grinding
- Application:Stainless steel, cast iron
- Quantity:99
9.7

Exceptional

Our Rating
3

BOSCH
BOSCH CO14B 14-Piece Assorted Set with Included Case - Cobalt M42 Metal Drill Bits with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, and Light-Gauge Metal
Main highlights

Durable and Heat-Resistant Design
Cobalt M42 drill bit for durability and high heat resistance.

Ideal for Tough Metal Drilling
Perfect for stainless steel, cast iron, titanium, and light-gauge metal.

Exceptional Customer Praise for Durability
Consistently praised for lasting performance and clean cuts.
Key specs
- Size:14 pc. Drill Bit Set
- Material:Stainless Steel, Cobalt
- Point Design:135 Degrees
- Application:Cast Iron, Metal
- Quantity:14
9.4

Excellent

Our Rating

8.9
Sheerness

8.7
worth the money

8.4
lasts a long time
4

DEWALT
DEWALT Cobalt Alloy Steel Drill Bit Set with Pilot Point, 14-Piece (DWA1240)

43% Off
Main highlights

Efficient Storage Design
Connectable storage system optimizes space, with a clear lid for easy visibility.

Ideal for Metal Drilling
Perfect for drilling in metal, wood, and I-beams with precision.

Durability in Cobalt Bits
Cobalt bits praised for staying sharp and effective with proper care.
9.2

Excellent

Our Rating

9.5
Simple to use

9.3
materials Quality

9.3
Sheerness
5

MACXCOIP
MACXCOIP Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic, with Index Storage Case, 1/16"-1/4"

18% Off
Main highlights

Durable and Versatile
The M35 cobalt drill bits are robust, suitable for metals, wood, and plastics.

Ideal for Metalworking
Perfect for cutting stainless steel, cast iron, and soft metals.

Praised for Precision
Customers appreciate the precise sizing and efficient performance.
Key specs
- Size:Various Sizes
- Material:M35 Cobalt
- Point Design:135 degree point tip
- Application:Stainless steel, soft metals
- Quantity:13 sets
9.0

Excellent

Our Rating
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6

COMOWARE
COMOWARE Cobalt Drill Bit Set- 15Pcs M35 High Speed Steel Twist Jobber Length for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with Indexed Storage Case, 1/16"-3/8"
Main highlights

High Quality Material
Made from M35 Cobalt High Speed Steel for durability.

Versatile Use Cases
Ideal for drilling hard metals, stainless steel, and wood.

Praised Drill Performance
Customer reviews highlight effective drilling and reasonable price.
Key specs
- Size:15pcs jobber length
- Material:5 Cobalt High Speed Steel
- Point Design:135 SPLIT POINT
- Application:hard metals, plastics, woods
- Quantity:15pcs
8.8

Very Good

Our Rating

9.1
worth the money

8.9
Durability

8.9
Sheerness
7

BOSCH
BOSCH CO14 14-Piece Assorted Set with Included Case Cobalt Metal Drill Bit with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, Light-Gauge Metal, Aluminum
Main highlights

Durable Cobalt Construction
Manufactured from cobalt for drilling in hard and abrasive materials, ensuring longevity and reliability.

Versatile Drilling Applications
Ideal for stainless steel, cast iron, titanium, and light-gauge metals, offering broad utility.

Precision and Performance
No-skate split-point tip praised for clean, precise holes and accurate starts.
Key specs
- Product Dimensions:4.2 x 8.7 x 1.5 inches
- Country of Origin:China
- Battery Life:N/A
- Screen Size:N/A
- RAM Size:N/A
8.7

Very Good

Our Rating
8

VALYRIANTOOL

VALYRIANTOOL 2PCS 1/4" M35 Cobalt Stubby Drill Bit for Stainless Steel, Hard Metals & Cast Iron, with 1/4" Hex Shank for Quick Chucks & Impact Drivers
8.6

Very Good

Our Rating
9

LingGan

Metric Cobalt Drill Bits Set 1.5-6.5mm 13PCS, M35 high Speed Steel, high Hardness Straight Shank Drill, Mechanical or Hand Drill for Drilling, Suitable for Stainless Steel, Iron, Copper and Aluminum.
8.5

Good

Our Rating
10

Kendo
KENDO 13PCS Cobalt Drill Bit Set(1/16"-1/4"), M35 High Speed Steel, 135 Degree Tip, Twist Jobber Length Drill Bits Set for Hard Metal, Stainless Steel, Cast Iron and Wood with Metal Storage Case
Main highlights

Key Features
High-quality 5% Cobalt alloy steel, self-centring 135-degree split point, bronze steam surface for durability and wear resistance.

Ideal Use Cases
Perfect for drilling in stainless steel, cast iron, high temperature alloys, titanium, plastics, and woods. Versatile for professional and DIY projects.

Customer Praise
Most reviews highlight the drill bits` long-lasting sharpness, efficient drilling performance, and the sturdy metal box for easy organization.
Key specs
- Size:1/16 to 1/4
- Material:5 Cobalt alloyed steel
- Point Design:135-degree split point
- Application:Stainless steel, cast iron
- Quantity:N/A
8.3

Good

Our Rating

10 Best cobalt drill bits of 2025

1

Drill America - DWD29J-CO-PC 29 Piece M35 Cobalt Drill Bit Set in Round Case (1/16" - 1/2" X 64ths), DWDCO Series

8.2

8.2

8.0

How do we rank?

How do we rank?

Analyzing top stores

2

Sinyeenglon Cobalt Drill Bit Set for Hardened Metal and Stainless Steel, 99Pcs M35 High Speed Steel Twist Jobber Metal Drill Bits 1/16"-3/8", with Plastic Index Storage Case

3

BOSCH CO14B 14-Piece Assorted Set with Included Case - Cobalt M42 Metal Drill Bits with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, and Light-Gauge Metal

8.9

8.7

8.4

4

DEWALT Cobalt Alloy Steel Drill Bit Set with Pilot Point, 14-Piece (DWA1240)

9.5

9.3

9.3

5

MACXCOIP Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic, with Index Storage Case, 1/16"-1/4"

6

COMOWARE Cobalt Drill Bit Set- 15Pcs M35 High Speed Steel Twist Jobber Length for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with Indexed Storage Case, 1/16"-3/8"

9.1

8.9

8.9

7

BOSCH CO14 14-Piece Assorted Set with Included Case Cobalt Metal Drill Bit with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, Light-Gauge Metal, Aluminum

8

VALYRIANTOOL 2PCS 1/4" M35 Cobalt Stubby Drill Bit for Stainless Steel, Hard Metals & Cast Iron, with 1/4" Hex Shank for Quick Chucks & Impact Drivers

9

Metric Cobalt Drill Bits Set 1.5-6.5mm 13PCS, M35 high Speed Steel, high Hardness Straight Shank Drill, Mechanical or Hand Drill for Drilling, Suitable for Stainless Steel, Iron, Copper and Aluminum.

10

KENDO 13PCS Cobalt Drill Bit Set(1/16"-1/4"), M35 High Speed Steel, 135 Degree Tip, Twist Jobber Length Drill Bits Set for Hard Metal, Stainless Steel, Cast Iron and Wood with Metal Storage Case

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