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5 Best Cobalt Drill Bits For Steels of 2025

Last Updated - 2025/09/17

1
Best Choice

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Drill America

Drill America DWD29J-CO-PC Qualtech 29 Piece Cobalt Steel Jobber Length Drill Bit Set in Plastic Case, Gold Oxide Finish, Round Shank, Spiral Flute, 135 Degrees Split Point, 1/16" to 1/2" Size

Drill America

CA$146.41

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Main highlights
- Set of 29 jobber length drill bits includes inch sizes 1/16" to 1/2" in 1/64" increments
- Self-centering 135-degree split point penetrates hard material without a pilot hole and produces small chips to reduce clogging
- Meets ANSI specifications
- Gold oxide finish lubricates the drill bit and provides wear resistance
- Cobalt steel provides extended tool life compared to high-speed steel drill bits when drilling hard materials
CA$146.41
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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

JEFE HEX

JEFE HEX 29 PCS M35 Cobalt Drill Bit Set, HSS Twist Jobber Drill Bits with 135 Degrees Split Point and Three-Flat Shank, 3/8” Reduced Shank, Gold Oxide Metal Drill Bits Set (1/16” - 1/2” x 1/64”)

JEFE HEX

CA$94.51

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Main highlights
- WIDE APPLICATIONS: Jefe Hex 29 PCS set with sharp and hard cutting edge is ideal for versatile applications especially for projects made from stainless steel, such as kitchenware maintenance, machine parts, medical equipment and DIY projects. It can also be used to drill cast iron, high temperature alloy, titanium alloy and even hard plastics and wood.
- ROUND AND PORTABLE CASE: Say goodbye to constant losing or misplacing your drill bits! Jefe Hex cobalt drill bit set for metal comes with an ergonomic and portable round carrying case with built-in clip. The case can be easily attached to your tool belt keeping your bits within immediate reach!
- DRILL BIT 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", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8", 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64" and 1/2" (by 1/64" increments).
- COBALT GOLD OXIDE JOBBER DRILL BITS: 29 PCS high speed steel with 5% cobalt drill bit set resists high heat abrasion while drilling. Cobalt steel provides extended tool life compared to high-speed steel drill bits, and maintains the tool's toughness and hardness in high drilling temperatures. A gold oxide finish acts as a lubricant and provides wear resistance.
- 135 DEGREES SPLIT POINT TWIST DRILL BITS: A self-centering 135° split point drill tip penetrates hard materials without a pilot hole and keeps sharp without walking on the surface compared to a 118-degree point. Proper twist and flute design clears chips and particles fast. Drill bits larger than 3/8" have 3/8” reduced shank for majority drills in the market. Drill bits smaller than 3/8" have three-flat shanks that reduce spinning in chuck.
CA$94.51
3

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

STROTON

Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)

STROTON

CA$49.89

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Main highlights
- This Cobalt Drill Bit is Typically Capable of Running Three to Five Times Faster.Despite the Higher Price,the Cost Per Hole When Using Cobalt Drill Bit Will be the Lowest,Since It Can Produce So Many More Holes.
- The Sufficiently Sharp Bit Edge Can Cut the Metal Material into Long Strips of Iron Chips rather than Slowly Grinding through the Material with a Blunt Drill Bit.
- Premium M42 8% Cobalt Steel ,68-70 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life.
- 3 Steps Design for Cutting through Stainless Steel,Hard Metals,Aluminum,Plastic,and Hard Wood.
- 19Pcs 135 Degree Split Point Drill Bits Includes :1mm(length:3.4cm) 1.5mm 2mm 2.5mm 3mm 3.5mm 4mm 4.5mm 5mm(length:8.5cm) 5.5mm 6mm(length:9cm) 6.5mm 7mm 7.5mm 8mm(length:11.5cm) 8.5mm 9mm 9.5mm 10mm(length:13cm) [DIA 0.5mm Increments] .
CA$49.89
4
Best Value

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Bosch

BOSCH CO21B 21 Pc. Cobalt M42 Drill Bit Set

Bosch

CA$69.99

CA$73.99
(5% Off)

More Details
Main highlights
- Thick web-helix design – provides additional stability in tough applications.Case Type:Plastic
- Surface-hardened tip – penetrates tough abrasive materials
- High-heat resistant bits – withstand high-temperature applications for extended periods of time
- Enhanced M42 alloy material – contains 8% Cobalt alloy that delivers 10x life vs. Standard bits
- 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
CA$69.99
CA$73.99 (5% Off)
5

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Sinyeenglon

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

Sinyeenglon

CA$89.99

More Details
Main highlights
- Use Notices: Drill bit should be vertical to the workpiece when used; controling low speed from 200 to 1000 rpm; using cutting fluid will stay cool to make the bit last longer
- Hardened Full Grinding Process: Increases wear resistance, sharp and durable, used for stainless steel, cast iron, titanium, aluminum and hard metal
- Convenience And Practicality: Commonly used drill bit models with multiple sizes, different drill bit sizes are stored in different compartments of the plastic box, with the corresponding sizes of different drills printed on the bottom of the lid, which is very convenient to access
- Cobalt M35 Material: High cost, but hardness is up to 67, cut faster and has a long life, up to 12 times compared with the average HSS titanium coated bit
- 99Pcs Set List: 16Pcs 1/16in, 16Pcs 5/64in, 15Pcs 3/32in, 10Pcs 7/64in, 10Pcs 1/8in, 8Pcs 9/64in, 8Pcs 5/32in, 3Pcs 11/64in, 3Pcs 3/16in, 2Pcs 13/64, 2Pcs 7/32, 2Pcs 1/4in, 2Pcs 5/16in, and 2Pcs 3/8in
CA$89.99

5 Best Cobalt Drill Bits For Steels of 2025

Drill America DWD29J-CO-PC Qualtech 29 Piece Cobalt Steel Jobber Length Drill Bit Set in Plastic Case, Gold Oxide Finish, Round Shank, Spiral Flute, 135 Degrees Split Point, 1/16" to 1/2" Size

JEFE HEX 29 PCS M35 Cobalt Drill Bit Set, HSS Twist Jobber Drill Bits with 135 Degrees Split Point and Three-Flat Shank, 3/8” Reduced Shank, Gold Oxide Metal Drill Bits Set (1/16” - 1/2” x 1/64”)

Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)

BOSCH CO21B 21 Pc. Cobalt M42 Drill Bit Set

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

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STROTON 5% Cobalt Drill Bit Set (1/16-3/8 Inch, 21PCS) for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood, M35 Hss Heavy Duty Twist Steel Drill Bits Index.

STROTON Metric 5% Cobalt Step Drill Bit for Stainless Steel and Hard Metal (4-32mm/15 Steps)

Hymnorq Cobalt Drill Bits 15PC Set, Metric Size 1.5-10mm in Indexed Case, M35 Grade HSS Co Fully Ground Construction, 135 Degree Split Point for Drilling Stainless Steel Cast Iron Brass Aluminium

Cobalt Drill Bit Set 10 PCS, M35 Jobber Length Twist Drill Bits Kit for Hard Metal, Cast Iron, Stainless Steel, Wood and Plastic, with Storage Case.

STROTON Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood

NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set for Stainless Steel & Hard Metals, with 1/4" Hex Shank for Quick Chucks & Impact Drivers, SAE Sizes 3/32"-1/8"-3/16"-1/4"-5/16" in Storage Case

Hymnorq 40PC M35 Cobalt Steel Twist Jobber Small Drill Bits, 4 Sizes 3/64 Inch 1/16 Inch 5/64 Inch and 3/32 Inch, Extremely Heat Resistant, for Stainless Steel

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