Best M42 Cobalt Drill Bits In June 2025

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There is always a perfect Best M42 Cobalt Drill Bits out there in the market for you. However, you may not have the time and resources to try and research each of them in detail. So we’ve done the heavy lifting and are sharing below our detailed review of Top 10 Best M42 Cobalt Drill Bits.

To help you in your search, we have completed this list of the Best M42 Cobalt Drill Bits.

Top Rated Best M42 Cobalt Drill Bits Of 2025

Rank	Product Name	Score
1	Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Buy Now	9.7 Buy Now
2	Bosch CO14B 14 Pc. Cobalt M42 Drill Bit Set Buy Now	9.5 Buy Now
3	DEWALT Cobalt Drill Bit Set with Pilot Point, 14-Piece (DWA1240) Buy Now	9.1 Buy Now
4	Drill Hog USA 13 Pc COBALT Drill Bit Set Index M42 Drill Bits Buy Now	8.8 Buy Now
5	IRWIN Drill Bit Set, Cobalt, 15-Piece (316015) Buy Now	8.6 Buy Now
6	Drill Bit Set Twist Drill Bits Made of Cobalt Steel, M42 HSS 135 Buy Now	8.3 Buy Now
7	Drill Hog USA 1/8" Cobalt M42 Drill Bits 12 Pack Buy Now	8.1 Buy Now
8	Drill America 29 Piece M42 Cobalt Drill Bit Set in Round Case Buy Now	7.8 Buy Now
9	Drill Hog USA 1/4" Cobalt M42 Drill Bits 12 Pack Buy Now	7.5 Buy Now
10	Drill America 29 Piece M35 Cobalt Drill Bit Set in Round Case Buy Now	7.2 Buy Now

1. Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard

• Premium m42 8% cobalt steel ,68-70 hrc (rockwell hardness scale) ,usually give the best heat,wear and chip resistance and long tool life.
• The sufficiently sharp bit edge can cut the metal material into long strips of iron chips rather than slowly grinding throng the material with a blunt drill bit.
• 3 steps desigh for cutting through stainless steel,hard metals,aluminum,plastic.
• 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.
• 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 .

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

• Thick web-helix design provides additional stability in tough applications
• 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
• Enhanced m42 alloy material contains 8% cobalt alloy that delivers 10x life vs. standard bits
• Surface-hardened tip penetrates tough abrasive materials

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

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

4. Drill Hog USA 13 Pc COBALT Drill Bit Set Index M42 Drill Bits

• Solid cobalt m42 steel
• 135 degree split point prevents the bit from "walking"
• 1/16" - 1/4" by 1/64ths (13 drills)
• Made by drill hog usa
• Lifetime warranty

5. IRWIN Drill Bit Set, Cobalt, 15-Piece (316015)

• Similar cobalt sets available for almost every drilling application
• Reduced shank above 3/8-inch allows the use of larger drill bits in a 3/8-inch chuck
• Extra hard drill for greater wear
• 135-degree split point tip starts on contact, cuts with less force
• Cobalt steel extends cutting edge life and maintains cutting life after resharpening
• Cobalt steel extends cutting edge life and maintains cutting life after resharpening

6. Drill Bit Set Twist Drill Bits Made of Cobalt Steel, M42 HSS 135

• Cobalt drill bit set is versatile drilling accessories to use, for a wide range of applications such as stainless steel, aluminum, plastic, wood, cast iron, and so on.
• Kavol cobalt drill bits are made from m42 cobalt hss steel for long-lasting strength and durability.
• 8% cobalt steel provides extended tool life compared to high-speed steel drill bits when drilling hard materials.
• Self-centering 135-degree split point penetrates hard material without a pilot hole and produces small chips to reduce clogging.
• Packed in a metal carry case, the index case indicates every size clearly, easy to organize and store, also protect the drill tip.

7. Drill Hog USA 1/8" Cobalt M42 Drill Bits 12 Pack

• 1/8" cobalt m42 jobber legnth
• Tri-flat shank prevents "slipping" in the drill chuck
• Drill hog usa lifetime warranty
• Package of 12 drills (one dozen)
• 135 degree split point prevents "walking"

8. Drill America 29 Piece M42 Cobalt Drill Bit Set in Round Case

• Gold oxide finish acts as a lubricant and provides wear resistance
• Round shanks allow use with a wide variety of tool holding systems
• 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
• When all hands are on deck, hang the drill index on your belt whether you're in the shop or field
• Cobalt drills are effective in drilling tough, high tensile strength materials like stainless steel, inconel, and titanium
• Set contains 29 m42 cobalt drill bits sizes 1/16" - 1/2" x 1/64" increments

9. Drill Hog USA 1/4" Cobalt M42 Drill Bits 12 Pack

• Drill hog usa lifetime warranty
• 135 degree split point prevents "walking"
• Package of 12 drills (one dozen)
• Tri-flat shank prevents "slipping" in the drill chuck
• 1/4" cobalt m42 jobber legnth

10. Drill America 29 Piece M35 Cobalt Drill Bit Set in Round Case

• Cobalt steel provides extended tool life compared to high-speed steel drill bits when drilling hard materials
• Meets ansi specifications
• Set of 29 jobber length drill bits includes inch sizes 1/16" to 1/2" in 1/64" increments
• Gold oxide finish lubricates the drill bit and provides wear resistance
• Self-centering 135-degree split point penetrates hard material without a pilot hole and produces small chips to reduce clogging