When you pair your drill with the proper drill bit, you can successfully complete any project. Having the right drill bit helps you complete your project more efficiently, and ease frustration.
Below we share our expert buying and choices for the best drill bits for working with hardened steel. Let’s go!
Comparisons of High-Quality Drill Bits for Hardened Steel Bolts
Take your time and read the following products that we have reviewed. Your preferred item may lie somewhere on the list.
Review of the 11 Best Hardened Steel Bolt Drill Bits on the Market
1. DeWalt DW1361 Titanium Drill Bit Set
- Material: Titanium Nitride Coated
- Size Bits: 1/16″ to 1/2″
- Finish Type: Titanium Nitride
- Tool Flute Type: Spiral
- Number of bits: 21 bits
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Are you looking for a drill bit that is guaranteed to serve you for a lifetime?
Size Bits: 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, 5/16″, 3/8″, 1/2″
Product Description
Durability: Each tool has an extra titanium coating on it to boost the strength and durability of the bits. This is in addition to the web-like design for extra support, which makes the bits suitable for use on any type of material.
Utility: The twenty-one different types of drill bits featured in this set allow for a wide variety of functions.
Another thing we are going to mention is that the bits have no spin shanks. Consequently, changing drill bits during operation is going to be a straightforward affair.
Benefits: We liked that the bits start drilling immediately when they come into contact with the surface. In the end, you are likely to use less time and energy on a project using this product.
In general, these drill bits are going to give you some nice-looking holes after a mess-free operation.
- Damage-resistant
- Easy bit changes
- Versatile
- Poor case quality
2. Drill America M35 DWDCO Series Drill Bit Set
- Material: Cobalt
- Cuts through: Steel, Stainless Steel, Metal, Inconel, Titanium
- Size Bits: 1/16″ to 1/2″ in 1/64″ increments
- Finish Type: Gold Oxide
- Tool Flute Type: Spiral
- Number of bits: 29 bits
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Drill America gives us 29 cobalt drill bits that are rust-resistant due to the
Product Description
Another great feature of the gold oxide finish is how it acts as a lubricant to protect the bits when subjected to extreme use. Each bit has a self-centering 135-degree split point for easy penetration into tough materials.
Using cobalt, which is known to have tolerance towards high temperatures and pressure, adds to the bit’s suitability for drilling through tough materials.
With this set, you have a wide range of precision to choose from due to the inch sizes that range from 1/16″ to 1/2″ in 1/64″ increments.
The set comes in a plastic case with a belt hook, which gives you more options as you operate in tight spaces. The case is divided into clearly-labeled portions for easy identification of the tools when needed.
Lastly, the product meets ANSI specifications to assure you of impeccable quality.
- Plastic case for organization
- Rust-resistant bits
- 29 pieces in the set
- A bit pricy
3. Irwin Hanson 11135ZR Screw Extractor/Drill Bit Set
- Material: Cobalt Alloy Steel
- Size Bits: 5/64″ to 1/2″
- Finish Type: Cobalt Alloy Steel
- Tool Flute Type: Spiral
- Shank Type: Straight, Square
- Number of bits: 35 bits
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If your drilling operation is not as smooth as it should be due to the drill bits
Size Bits: 5/64″, 7/64″, 1/8″, 5/32″, 3/16″, 7/32″, 1/4″, 9/32″, 19/64″, 5/16″, 11/32″, 3/8″, 13/32″, 7/16″, 15/32″, 1/2″
Product Description
First, the bits have an aggressive left-hand design to give it the gripping power need for the job. On top of that, the spiral flutes and multi-spine extractors help in drilling through the surface for a smoother operation.
The sizes of the extractors and drill bits are etched on each tool to eliminate guesswork when it comes to selecting the right tool for a particular task.
We liked the multi-spline extractors, which are specially designed for high-torque applications.
Lastly, the package includes a plastic case for storage and transportation.
- Left-hand design for good grip
- Built to last
- Sizes are labeled on the tools
- No user manual
- Not great quality
4. Irwin 3018002 Drill Bit Set
- Material: Cobalt
- Cuts through: Metal, Heavy-duty abrasive alloy metal
- Size Bits: 1/16″ to 1/2″ in 1/64″ increments
- Tool Flute Type: Spiral
- Number of bits: 29 bits
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For over a century, Irwin has developed a reputation for producing high-quality power tools that never disappoint.
In this review, we are going to see whether the Irwin 3018002 reaches the high standards associated with the brand.
First, this set contains drill bits with cobalt construction that gives them extensive heat and abrasion resistance. So, the bits are well-suited for heavy-duty drilling through the toughest materials such as hardened steel.
With about twenty-nine pieces in the set, it will be easy for you to find the right tool for any heavy-duty drilling task that you may have.
You may also notice that these bits have reduced shanks. This allows you to use larger drill bits in a 3/8″ chuck.
Getting the right bit for the job shouldn’t be a problem with this set, as you have a tap and drill selection chart to help in the choosing.
There is also the removable bit cartridge to help you move the bits from the case to your worksite. The case is a rubber over-molded one for secure storage.
Buyer’s Feedback Section
- Comes with different bit sizes
- Built to last
- Has a storage case
- Poor packaging
- Expensive
5. Comoware Step Drill Bit Set
- Material: Titanium, High-Speed Steel
- Cuts through: Metal, Wood, Plastic countersunk
- Size Bits: 1/16″ to 1/2″ in 1/64″ increments
- Finish Type: Titanium, Steel
- Tool Flute Type: Spiral
- Number of bits: 6 bits
Are you looking for an item that would deliver whether you use it indoors or outdoors?
Product Description
Strength: First, the bits are designed to serve you for the longest time possible. It is made out of high-speed steel and is coated with titanium. This combination gives the accessory impressive durability.
Also, the bits are built to be sharp, which reduces friction. You can operate the machine for a longer duration without overheating the motor.
Utility: We liked the flexibility that these bits offer, and you can use them to drill holes of different diameters. This makes them ideal for all sorts of drilling projects.
With the 135-degree split point and dual-flute, you can trade ‘walking’ and ‘slipping’ with a smooth operation. This design also provides you with more penetrative power, and the split point boosts their abrasion-resistance.
Lastly, the carry case and drill holder are both useful in securing the bits after use.
- Sizes are etched on the bits
- Flexible for diverse operations
- Durable
- Not for high-speed applications
- Poor quality
6. DeWalt DW1263 Pilot Point Drill Bit Set
- Material: Cobalt
- Cuts through: Stainless steel and other hard metals
- Size Bits: 1/16″ to 3/8″
- Tool Flute Type: Spiral
- Number of bits: 14 bits
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DeWalt is a top brand that has been producing power tools for a long time. 
In this review, we are going to explain to you why we believe this drill bit set is one of the best high-performance set that you may ever come across.
Product Description
We shall start with the cobalt construction that gives the bits enough sturdiness and sharpness to drill through the toughest metals and steel sharply and quickly.
The next aspect to discuss is the case. It is well-built from industrial-grade ABS material for secure storage of the 14 different bits of different sizes. The package is divided into labeled slots for proper organization and easy identification of the accessories.
Another feature is the pilot point end that aims to prevent walking and instead supply the preciseness you have been looking for.
Besides the case, the package also features a bit holder for storage of the bits after use. The best thing about this case is the interlocking hinge and rubber lock that ensures it remains tightly locked.
- 14 different bits for different tasks
- Durable bits
- Well-built case
- The small bits cannot handle high pressure
- Break often
7. Irwin 11119 Screw Extractor and Drill Bit Set
- Material: Steel
- Cuts through: Stainless steel and other hard metals
- Tool Flute Type: Spiral
- Number of bits: 10 bits
- Size Bits:
- Drill Bits: 5/64″ to 19/64″
- Extractors: EX-1 to EX-5
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The Irwin Hanson brand makes it to our list once again, and this should be an indicator that you are dealing with a high-quality product.
Size Bits: 5/64″, 7/64″, 5/32″, 1/4″, 19/64″
Does the Irwin 11119 set meet the standards set by previous models from the brand? Let’s see.
Product Description
This set contains five drill bits and five extractors with winding flutes to embed themselves deeper into the metal during the drilling operation. The only thing is that the drill must be in reverse mode before you embark on the process.
The bits have a left-hand spiral design to make them easy to use, as they offer you a soft and comfortable drilling power.
You are sure to like the ergonomic design that enables you to remove the broken bolts, studs, and socket screws with maximum ease.
The size of each extractor and drill bit is etched on the surface so that you can easily choose the appropriate item for each task.
Last but not least is the storage case for putting away the accessories after use.
- Aggressive left-hand design
- Ergonomic design
- Sizes etched on the surface
- Very poor quality
8. DeWalt DWA1240 Cobalt Drill Bit Set
- Material: Cobalt Alloy Steel
- Cuts through: Wood, Metal or i-beams
- Size Bits: 1/16″ to 3/8″
- Tool Flute Type: Spiral
- Number of bits: 14 bits
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An efficient drill bit is one that is built with sharpness and durability as the top priority.
Size Bits: 3/8″, 5/16″, 1/4″, 7/32″, 3/16″, 5/32″, 1/16″, 5/64″, 3/32″, 7/64″, 1/8″, 9/64″
In our review, we will reveal the significance of the two features above and other useful aspects of the product.
Product Description
Let’s start with the split point. This design makes the bit fast and gives it the capability to drill through the toughest materials, including stainless steel.
Next is the pilot point, which provides you with more control to eliminate any shakiness during operation. Therefore, you are likely to have a smooth drilling experience.
With the 14 drill bits pieces, you will be spoilt for choice on the appropriate item to use for various tasks.
The bits are made out of cobalt to give it the sturdiness that makes them damage-resistant. On top of that, the material is rust-proof to boost the bits’ durability further.
Lastly, the pricing is also right so that you do not have to dig too deep into your pockets to acquire this tool.
- Well-made
- Affordable
- Pilot point for stability
- Not that durable
9. Amoolo 13-Piece Cobalt Drill Bit Set
- Material: M35 Cobalt HSS
- Cuts through: Steel, Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood
- Size Bits: 1/16″ to 1/4″
- Shank Type: Straight
- Tool Flute Type: Spiral
- Number of bits: 13 bits
This is a relatively unfamiliar brand, but that does not make it inferior to the rest.
Size Bits: 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″.
Let’s see what it has for us.
Product Description
This set includes 13 pieces of different sizes so you easily have one for every need. Even better is that the bits are compatible with most of the power drills that you find in the market.
We also liked the high-speed steel and M35 cobalt construction that boosts the bits’ wear-resistance and durability.
These bits feature a 135-degree split point and a straight shank, a combination that prevents walking for a faster and precise drilling process.
We should also mention the fully ground spiral groove design that clears the particles quickly to minimize friction.
Within 90 days, if you are not satisfied with the product, you can ask for a full refund or replacement due to the 90-day warranty.
- Ideal for multiple application
- Comes with a 90-day warranty
- High-quality construction
- Break often
- Not great for wood
10. Efficere 8-Piece Silver and Deming Drill Bit Set
- Material: Metal
- Cuts through: Wood, Plastic, Aluminum, Copper, Stainless, Sheet metals
- Size Bits: 9/16″ to 1″
- Shank Type: 3-Flat
- Finish Type: Gold Titanium and Black Nitride Dual Coating
- Tool Flute Type: Spiral
- Number of bits: 8 bits
If you have to drill holes with diameters exceeding half inches, the Efficere drill bit set would be a reasonable pick.
Product Description
First, these bits are quite durable, and we attribute this longevity to the premium cobalt high-speed steel construction. This gives them the sturdiness to drill through different materials such as wood, copper, and aluminum.
The dual-coating comprised of gold titanium and black nitride acts as a lubricant for a smooth drilling experience. This finish also gives the bits corrosion-resistance property.
Another feature is the 135-degree split point design that improves the cutting speed and minimizes walking or wobbling during operation.
Other Features and Benefits
The ½” shank with the tri-flatted end locks securely onto the chuck. This is crucial in ensuring there are no slips during operation.
Lastly, the bits come with a heavy-duty aluminum case for transportation and storage of the equipment.
- Designed for drilling bigger holes
- The finish keeps them lubricated
- Durable
- Not for extremely hard surfaces
11. Irwin 63221 Drill Bit Set
- Material: Cobalt Alloy Steel
- Cuts through: Tough metals
- Size Bits: 1/16″ to 3/8″ in 1/64″ increments
- Shank Type: Straight
- Finish Type: Cobalt Alloy Steel
- Tool Flute Type: Spiral
- Number of bits: 21 bits
The last item on our list is from the Irwin brand, and just because it closes down our list does not mean it is inferior. The model has an advanced design that makes it an ideal choice if you are into professional drilling.
Product Description
The creative design we mentioned is the shorter cutting lips. This reduces torque and makes drilling on the harder surfaces easier. There is also the 135-degree split point tip that reduces resistance during drilling.
You should also know about the M-42 metal with 5% cobalt construction, which gives the bits sturdiness and makes them damage-resistant.
Besides that, cobalt makes the bits rust-resistant that increases durability and remains useful for longer than other bits.
We liked the spiral flute design that allows for faster bit changes as you go about your work. Then, the package includes a metal safety box for safe storage of the bits when not in use and for ease of transportation.
This set is quite pricey, but we believe it offers you value for your money.
- High-quality construction
- Allows for easy bit changes
- Metal box for storage
- Expensive
The Buying Guide
As you look for the best drill bit for hardened steel bolt, there are several features that you should consider. This list will help you narrow down your search and boost your chances of finding the perfect item.
I) Material
The material used to construct the bits determines their level of efficiency and performance. Hardened steel is extremely sturdy, and to penetrate it, you need something tougher. The top materials that we recommend include cobalt, carbide, and hardened steel.
II) Flute Design
It would be best to get a 30-degree flute design as this is better suited for dealing with tougher materials such as hardened steel.
III) The Coating
The coating helps in boosting the metal’s durability by enhancing its rust and corrosion resistance. So, it is important if you can find the strongest coating for the job.
The coating that we recommend you look out for include black oxide and titanium carbo-nitride coating. These are likely to do an excellent job of protecting the steel from rust and corrosion.
IV) Ease of Removing Broken Bolts
At times, parts of the drill bits or bolts get stuck inside the surface you are working on. This interferes with the smoothness of going about the operation.
So, the drill bit ought to have a swift reverse action for removing the stuck bits without destroying the material.
V) Extra Features
There are features such as the 135-degree split point with a self-centering mechanism that gives you more power as you operate the tool. This adds to its reliability for the user.
Another useful bonus would be x-type opening blades, as these would remove wastes during drilling for mess-free operation.
FAQs
Here are some of the queries that we faced in our research on the top-selling drill bits meant for hardened steel bolt. Their responses should boost your knowledge of the topic.
Q: Why am I having a hard time drilling through steel?
It may be due to your drill bits having some corrosion. To get yourself out of this situation, you should apply some oil on the bits.
Q: Is it possible to enlarge a hole on the hardened steel material?
Yes, it is. The best way to do so is by using a drill whose end is thicker.
Q: How can I clean my drill bits to remove the leftovers?
Start by mixing some water and a cleaning detergent in a basin full of water. Soak the bits in this mixture for a short while before using a brush to clean the bits. After that, allow the bits to dry.
Our Top Pick
In the end, we have selected the Dewalt DW1361 Titanium Drill Bit Set as the best overall. Everything about the set is just about right, from the construction quality to its versatility.
The only thing is that you have to contend with a low-quality storage case.
Final Word
Getting the perfect bit for drilling through tough materials such as hardened steel is a confusing task. We hope that our article has made things easier for you.
In the buying guide, we have spelled out the specifications of a perfect drill bit for hardened steel to have an easier time finding your ideal choice.