Best Cobalt Drill Bit Sets In 2022 – Top 6 Rated Reviews

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If you have worked with automooles in metal equipment or vehicle parts. The best cobalt drill bit sets are indispensable for working when you have steel appliances or vehicle accessories that need to be adjusted. However, not all cobalt drill bit sets are equal.

How can you tell which is the bbiles or motorcycles for very long at all, you have probably found a need to drill (or re-drill) hest cobalt drill bit sets for you?

Here is a review of the top 6 cobalt drill bit sets with a buyer’s guide included to help you answer that question.

Which drill bit set is right for you?

Best Cobalt Drill Bit Sets

Top 6 Best Cobalt Drill Bit Sets In 2022 Reviews

1 Irwin Tools – Bargain Bits

Irwin makes quality drill bits, many of them at around 8% cobalt levels. However, this 29 piece drill bit set is set at only 5% cobalt. This means it is softer and not as great resistant as may be required for your tougher steel-boring job.

On the other hand, this set gives you more bits for your bucks. Offering a range of sizes from 1/16 inch to 1/2 inches in every 1/64 inch every segment.

Irwin Tools - Bargain Bits
Our rating:4.4 out of 5 stars (4.4 / 5)

  • 29 Piece Cobalt Drill Bit Set
  • 5% Cobalt For Higher Heat & Abrasion Resistance
  • Sizes 1/16″ -1/2″ in 1/64″ increments,
  • 135 Degree Split Point To Minimize Walk
  • Heavy Duty Web Construction For Strength & Durability
  • Cheaper quality bits than the one purchased individually

2 Drill America DWDCO Series – Self-Centering and Slick

Here is another cobalt drill bit set that includes 29 pieces. Also, it increases sizes by 1/64 inches, from 1/16-1/2 inches.

Additionally, these bits have a gold finish which helps to lubricate the bit and prevents excessive wearing. The self-centering point keeps it from tearing out chunks unevenly. Like the previous best cobalt drill bit sets, these are made with a smaller percentage of cobalt which means it will not cut as easily through harder steel.

Drill America DWDCO Series - Self-Centering and Slick
Our rating:4.2 out of 5 stars (4.2 / 5)

  • Sizes are 1/16″ to 1/2″ in 1/64″ increments
  • Extended tool lifetime compared to high-speed steel drill bits
  • Gold oxide finish lubricates the drill bit
  • Self-centering 135-degree split point
  • Meets ANSI specifications
  • Not strong enough to drill through stainless steel

3 USA Drills Cobalt Drill Bit Set – Gently Does It

The reviews for this drill set vary in the extremes from the best cobalt drill bit sets to the worst. This usually indicates one or two situations in hardware tools.

The first possibility is that this company is inconsistent in its product. It is possible that the amount of cobalt mixed into the steel of these bits is not consistent. However, in this case, there is likely another possibility pulling down the ratings.

The second possibility is that the requirements of using this drill bit set correctly are either too challenging or not communicated well enough. This could lead customers to use these bits at higher speeds or on harder metals than they were designed to cut.

Regardless of which of these two problems the product has, the customer service and warranty assistance are not helpful enough to illuminate what the problem truly is.

USA Drills Cobalt Drill Bit Set - Gently Does It
Our rating:4.2 out of 5 stars (4.2 / 5)

  • Premium Solid Cobalt M42 Super High-Speed Steel
  • 1/16″ to 1/2″ in 1/64″ Increments
  • High Heat Treated Hardness 68-70 HRC
  • 135 Degree Split Point
  • Tri-Flat Shank Prevents “Spinning” in Chuck
  • Lots of variation in ratings
  • Problems with warranty

4 CO-Z Step Drill Bits – Stepping Up DIY Bits

This Titanium Step Drill Bit Set comes with 5 pieces that accommodate 50 different sizes of holes. While they are advertised for sheet metal, they work much better for softer metals and wood. These stepped-up bits provide a wide variety of options for those involved in DIY projects.

These titanium coated bits are more durable than the other best cobalt drill bit sets, but they still have their limits. When used with a center punch, they offer smooth drilling and cut much better. One of the best qualities of all is CO-Z’s customer service, which stands by their product and is eager to assist you in case of problems.

Additionally, being on a 5-piece set, you get more for your money with this set.

CO-Z Step Drill Bits - Stepping Up DIY Bits<br /><noscript><img class=
Our rating:4.5 out of 5 stars (4.5 / 5)

  • The titanium coating ensures extreme durability
  • Different Sizes of Holes Can Be Drilled
  • Smooth Drilling
  • Use Center Punch to Mark the Spot
  • Bits come in a well-organized case for easy transport and storage.
  • Good customer service
  • Not made for steel.

5 Craftsman Professional Cobalt Drill Bit Set – Value Set

This may be the best cobalt drill bit set for your money. It comes with the standard 21 pieces, set just below the typical 1/16”-1/2” (it stops at 3/8”). It is nearly identical to the Irwin tools but comes in at half the price.

While it shares similar specs with the other sets, it also shares their weaknesses. Although it is advertised as designed for heavy duty use, these bits last longer and perform much better on softer metals.

Craftsman Professional Cobalt Drill Bit Set - Value Set
Our rating:3.8 out of 5 stars (3.8 / 5)

  • 1/16″ to 3/8″ drill bit range
  • Includes a plastic carrying case
  • Designed for heavy duty use in all metals, including hard metals
  • The split point drills on contact and eliminates “walking.”
  • Ideal for drill presses and stationary machines
  • Excellent price for value
  • Difficulty cutting harder metals

6 Neiko 01925A – Screw Extractor and Left Hand Drill Bit Set

This 10 Piece set of Alloy Extractors/Cobalt HSS Drill Bits is one of the best cobalt drill bit sets for left-handed drills.

If you read the description carefully, you will see that these are not ordinary bits. Instead, these bits are made for extracting screws, bolts, studs, and other fittings. Additionally, the special does on the screw extractors dig into the screw and provide the necessary torque to pull it out.

These bits are very inexpensive, and, consequently, are not strong enough to bite through sheets of metal. However, they work well as extractors.

Neiko 01925A - Screw Extractor and Left Hand Drill Bit Set
Our rating:3.2 out of 5 stars (3.2 / 5)

  • Removes broken screws, studs, bolts, and other fittings
  • Left-handed drill bits
  • Made from cobalt fortified high-speed steel
  • Spiral flutes on screw extractors dig into the screw
  • Includes a durable metal index carry case for organization and storage
  • Set consists of a 5/64, 7/64, 5/32, 1/4, and 19/64 inch bits
  • Lesser quality
  • Not made for drilling through metal

Best Cobalt Drill Bit Sets Buyer’s Guide


The Irwin, Drill America, and Craftsman have similar levels of durability, although the Craftsman is about half the price of the other two beat cobalt drill bit sets. Durability is an essential aspect of drill bits. The reviews consistently report that the most durable do bits are sold individually, not in sets.

The CO-Z set is also particularly durable, but this set is designed with a special step up technology, which makes it harder to compare with the other bits.

The least durable bit set is the USA Drills bit set. Not only did it shares similar weaknesses with the other sets, but it also had the worst customer service rating to deal with durability issues.

Cobalt Drill Bit Sets


In the world of drill bits, the best cobalt drill bit sets have the highest number of drill bits in them. Both the Irwin set and the Drill America had 29 pieces in their sets. However, the CO-Z set, having only 5 bits, can drill up to 50 different sizes of holes. This makes the CO-Z set the most flexible of all of the best cobalt drill bit sets.


While most pieces of hardware follow the rule that you get what you pay for, when it comes to the best cobalt drill bit sets there seems to be a cutoff point. For standard drill bit sets between fifty and a hundred dollars, there appears to be little value gained. You either pay more by purchasing higher quality cobalt drill bits individually, or you can find similar quality bit sets for half the price.


The most important decision you have to make before purchasing the best cobalt drill bit sets is what you intend to drill through. If you were hoping to drill through stainless steel or any hard metals, you might be better off buying individual cobalt drill bits. Most of the bits in the sets do not have enough cobalt to withstand the pressure of drilling through metal for very long.

For wood or softer metals, there are plenty of options here in this list. The CO-Z bits, in particular, offer a wide variety of whole sizes through their step up technology design. For these tasks, you will find something within your price range.

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