10 Best cobalt drill bits of 2025

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1

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
- Quantity:99
- Material:Cobalt M35
- Point Design:Hardened Full Grinding
- Application:Stainless steel, cast iron
9.8

Exceptional

Our Rating
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Value for Money

2

MACXCOIP
MACXCOIP Cobalt Drill Bit Set, 29Pcs M35 High Speed Steel Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box, 1/16"-1/2"
Main highlights

Comprehensive Drill Bit Set
Various Sizes: 29 sets of drill bits from 1/16 to 1/2 inch, M35 cobalt material, 135-degree point tip, twist design, and HSS Jobber Length.

Versatile Application Range
Ideal for cutting stainless steel, iron castings, copper, aluminum, soft metals, plastics, and wood. Suitable for both soft and hard objects.

Durability and Sharpness
Customers frequently praise the drill bits for their sharpness and durability, particularly in cutting through steel and maintaining their edge over time.
Key specs
- Size:Various Sizes 29 sets
- Quantity:29 drill bits
- Material:M35 Cobalt
- Point Design:135 degree point tip
- Application:Stainless steel, soft metals
9.7

Exceptional

Our Rating

9.7
worth the money

9.3
lasts a long time

8.9
materials Quality
3

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

48% 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.
9.5

Excellent

Our Rating

9.5
Simple to use

9.3
materials Quality

9.3
Sheerness
4

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
- Quantity:14
- Material:Stainless Steel, Cobalt
- Point Design:135 Degrees
- Application:Cast Iron, Metal
9.2

Excellent

Our Rating

8.9
Sheerness

8.7
worth the money

8.4
lasts a long time
5

PATIKIL

PATIKIL 5/8" Drill Bit, 1/2" Reduced Shank M35 Cobalt 5% HSS with Titanium Aluminum Nitride Coating 135° Split Point for Hard Metal Stainless Steel High-Speed Cutting
9.1

Excellent

Our Rating
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6

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.
9.0

Excellent

Our Rating
7

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"
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
- Quantity:13 sets
- Material:M35 Cobalt
- Point Design:135 degree point tip
- Application:Stainless steel, soft metals
8.8

Very Good

Our Rating
8

Pro Edge Technology
Pro Edge Technology Cobalt Drill Bit Set, M35 High Speed Steel Drill Bits for Stainless Steel, Cast Iron and Wooden Plastics, DIY with Index Storage Box (Copper, 1/16"-1/4" 13pcs)
Main highlights

Versatile Size Range
Includes 13 commonly-used sizes from 1/16 to 1/4 inch.

Ideal for Hard Materials
Perfect for cutting stainless steel, cast iron, and more.

Enhanced Durability
M35 cobalt material ensures 3-5x longer life than M2 HSS.
Key specs
- Size:13 sizes: 1/16 to 1/4
- Quantity:13
- Material:M35, 5% cobalt
- Point Design:135-degree split point
- Application:Stainless steel, wood, DIY
8.6

Very Good

Our Rating
9

GMTOOLS
GMTOOLS 29Pcs Cobalt Drill Bit Set, 135 Degree Tip High Speed Steel with Black and Gold Finish, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16"-1/2"
Main highlights

High Durability and Versatility
High-speed steel with black and gold oxide finish offers corrosion and wear resistance, suitable for various materials like stainless steel and wood.

Perfect for Diverse Drilling Needs
Includes 29 drill bit sizes, ideal for tapping or creating clearance holes in metals, plastics, and wood.

Praised Quality and Storage
Customers appreciate the high-quality bits and metal indexed case, providing easy access and organization.
Key specs
- Size:7.76 x 4.61 x 2.36 inches
- Quantity:29 pieces
- Material:High-speed steel, black and gold oxide
- Point Design:135 degree split point
- Application:Stainless steel, cast iron, wood
8.5

Good

Our Rating
10

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
8.4

Good

Our Rating

10 Best cobalt drill bits of 2025

1

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

How do we rank?

How do we rank?

Analyzing top stores

2

MACXCOIP Cobalt Drill Bit Set, 29Pcs M35 High Speed Steel Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box, 1/16"-1/2"

9.7

9.3

8.9

3

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

9.5

9.3

9.3

4

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

5

PATIKIL 5/8" Drill Bit, 1/2" Reduced Shank M35 Cobalt 5% HSS with Titanium Aluminum Nitride Coating 135° Split Point for Hard Metal Stainless Steel High-Speed Cutting

6

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.

7

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"

8

Pro Edge Technology Cobalt Drill Bit Set, M35 High Speed Steel Drill Bits for Stainless Steel, Cast Iron and Wooden Plastics, DIY with Index Storage Box (Copper, 1/16"-1/4" 13pcs)

9

GMTOOLS 29Pcs Cobalt Drill Bit Set, 135 Degree Tip High Speed Steel with Black and Gold Finish, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16"-1/2"

10

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

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