Best Drill Bits for Hardened Steel Bolt 2021

Say goodbye to the hardened steel bolts!
Best Overall
DEWALT DW1361 21 Pc. Drill Bit Set
DEWALT DW1361 21 Pc. Drill Bit Set

Features

  • Wide range of commonly used drill bits
  •  Durable and strong titanium design finish Reliable for wood and plastic surfaces
  • Free from spin shanks  
  • Excellent for regular and professional use    
  • A thin web structure prevents breakage
Expert’s Pick
Irwin 63221 21 Pc. Drill Bit Set
Irwin 63221 21 Pc. Drill Bit Set

Features

  • Strong M-42 cobalt (high-speed steel) design finish
  • Beautiful gold finish
  • It comes with a variety of  configurations
  • 135-degree split point for reduced feed pressure 
  • Good option for drilling metal
  • Spiral flute design
Best Cheap
Drill America KFD29J 29 Pc. Drill Bit Set
Drill America KFD29J 29 Pc. Drill Bit Set

Features

  • Attractive black and gold oxide finish
  • Intense M-42 cobalt (high-speed steel) design finish
  • 135-degree split point for reduced feed pressure
  • Impressive plastic casing
  • Spiral flute design
  • Rustproof, Durable, and long-lasting

Choosing the right and powerful drill bit in the market may get confusing sometimes, especially when you have too many options to consider. Today we will bring a side-by-side comparison between ten best drill bits for hardened steel bolt. 

Selecting the right tool for the right job simplifies the job and increases one’s productivity. The tools may vary with price, brand and quality but no need to worry, as we are here to help you choose the best drill bit for hardened steel bolts. So let’s jump straight to the comparison.

Top Ten Best Drill Bits for Hardened Steel Bolt

Bosch CO14B 14 Pc. Drill Bit Set

9.4/10
This set comes with a 14 Pieces Cobalt set. Durable and proper start reduces bit shaking on the material's surface. The material used is M42 alloy containing 8% cobalt that delivers ten times the life versus the standard material.

It weighs almost 1.07 pounds and has a size of 9 x 4.6 x 1.6 inches. The best part is that it can quickly pierce through abrasive materials due to the rigid surface tip.

Product Features

Durable and Sustainable Design:

Talking about the design, it has some great features. For example, it contains a thick web helix design that adds to its stability in severe working conditions. Also, it is equipped with three flat shanks that hold the bit firmly and avoids bit slippage. 

The surface or top of the bit is sharped and hardened enough to pierce through strong material. And sharpness provides a good grip of the drill bit that quickly captures and starts drilling the material. 

Strong Material:

Bosch drill bits are quite famous for their unique and everlasting design finish. The main ingredient lies within the built quality of these bits. The Bosch CO14B comprises a new and advanced M42 alloy with an 8% cobalt. This enables the drill bits to last longer than standard drills and deliver up to 10 times better life.

Due to excellent built quality and strong material, Bosch CO14B can provide excellent drilling experience in stainless steel, cast iron, titanium, or heavy-duty metal. And this all makes it one of the strongest drill bit in its category.

Pros
  • Great built quality
  • Durable and strong design finish
  • Reliable for tough surfaces
  • The right combination of required tools
  • Excellent for everyday and professional use
  • Web helix drill bit design 
Cons
  • Suitable for drilling but not for cutting through the surfaces
  • Sometimes, it can be non-responsive for steel

DEWALT DW1361 21 Pc. Drill Bit Set

9.6/10
The set contains 21 pieces. It has a dimension of 8.75 x 8.75 x 1.38 inches. The body is made up of titanium. This allows it to be the best speed drills on stainless steel and other hard metals. It weighs 1.05 pounds.

It comes with an outclass finish, and the built quality will make you fall in love with the design. Its tapered web provides more outstanding stability to reduce fracturing.

Product Features

Consistent Performance:

The drill’s pilot point is made up of titanium, which means that it lasts longer before shattering. It also means that it can deliver consistent performance on metal and wood. It also has a tapered web design for increased durability.

Diversity:

Consequently, the set has many different types of drill bits. This different drill bit ranges from the size of 1/16 to 1/2 inches. Also, these are beautifully cased in a rigid plastic case for better care and long-lasting life. There are a total of 21 pieces in a drill set.

Pros
  • Wide range of commonly used drill bits
  • Durable and strong titanium design finish
  • Reliable for wood and plastic surfaces
  • Free from spin shanks
  • Excellent for regular and professional use
  • A thin web structure prevents breakage
Cons
  • May get slow on metals occasionally

IRWIN 63221 21 Pc. Drill Bit Set

9.4/10
The set contains 21 pieces that are made up of cobalt. It weighs 11 x 2 x 2 inches. Its body uses M-42 alloy that has 5% cobalt. It comprises a 135-degree split point that helps reduce feed pressure. In short, this, too, provides the best heavy-duty performance.

Product Features

Variety of Configurations:

The drill bit set has many different configurations. Mainly it comes in 15pcs, 21pcs, and 29 pcs pro set. The material used is M-42 cobalt high-speed steel that provides good performance in tough conditions. The material contains 5% cobalt for better performance. The 21 pieces configuration is ideal for everyday use.

Immersive Drilling Experience:

The bit set comes with a 135-degree split point that reduces feed pressure and enables easy penetration in drilling. It also helps to reduce physically applied pressure on drill and contributes to enhance the overall drilling experience.

Irwin drills bits have a strong spiral flute that helps yield quick chip ejection. The new, improved cobalt drill bits are preserved with a metal index case to keep safe for more extended periods.

Pros
  • Beautiful gold finish
  • Strong M-42 cobalt (high-speed steel) design finish
  • It comes with a variety of  configurations to choose from
  • 135-degree split point for reduced feed pressure and lessen physical pressure.
  • A good option for drilling metal
  • Spiral flute design
Cons
  • Drill bits below 1/4 inch may turn useless for few users

Drill America KFD29J 29 Pc. High-Speed Steel Drill Bit Set

9.2/10
The best drill bit for hardened steel is Drill America's KFD29J. It comes with the most number of pieces, i.e., 29. It is beautifully designed in a black and gold finish. The coating on this is designed to last longer while providing the best design finish. The dimensions are 6.4 x 3.3 x 3.3 inches, and it weighs 2.08 Pounds.

Product Features

Heavy-Duty High-Speed Drill Bit Set:

It comes with most drill bit pieces nicely packed in hard plastic carrying cases that are super easy to carry. They call it the killer force drill bit set because it can drill strong and tough surfaces like carbon steel, aluminum, stainless steel, and other hard metal materials. 

The drill bit also has a 135-degree split point for improved performance. The carrying case also has a belt clip for easy and quick access.

Rust Proof:

So indeed, the built quality is uncompromised in these drill bits. As mentioned above, it is made of high-speed steel material, which means it’s rustproof. This also means that the user can use them confidently on any material without worrying about water involvement. It’s rustproof, which means it has a long-lasting life.

Pros
  • Attractive black and gold oxide finish
  • Intense M-42 cobalt (high-speed steel) design finish
  • 135-degree split point for reduced feed pressure
  • Impressive plastic casing
  • Spiral flute design
  • Rustproof, Durable, and long-lasting
Cons
  • Sometimes, it's hard to find the spare parts

Spkline 13 Pcs Cobalt Drill Bit Set

9/10
The best drill bit for stainless steel, hardened metal, cast iron, and wood-plastic is the Spkline drill bit set. It comes in 13 pieces. The range of drill bit sizes varies from 1/16 inch to 1/4 inches. The coating on this drill bit set is designed to last longer while providing the best design finish. The dimensions 13.50 x 8.80 x 2.80 centimeters.

Product Features

Heavy-Duty Quality:

Talking about the built quality on this set, trust us! It’s too good. Yes! You read that right. 

It’s made up of M-35 cobalt blended with industrial-grade high-speed steel pooled with 5% cobalt. This, combined, make it more challenging and sustainable than ever before. The built material not only adds to its performance on harder surfaces. It certainly does also makes it lasts four times longer than standard metal drills. 

The story doesn’t end there. It also includes a 135-degree split point like others that eliminates the need for extra physical pressure on the drill. These all little yet powerful drill bits come in a metal casing that has sizes printed on it. So it’s not only easier to carry them; it’s also much more manageable.

Durability:

The design is very strong, durable, and intended to last longer. The drill bits are present in very practically used sizes. The drills are meant for precise and heavy-duty drilling tasks on plastic, wood, or even metal. The shank is straight and can easily fit into many electric-powered drills. The metal casing also contributes to its sustainability and long-lasting life.

Pros
  • Heavy-duty M-35 cobalt (high-speed steel) design finish
  • 135-degree split point for reduced feed pressure
  • Particular metal casing for easy ordered storage
  • Straight shank fit
  • Heat and scratch resistant durable, and long-lasting
Cons
  • Chiefly it's the right product and doesn't have any such wrong sides

IRWIN M35 (3018002) 29 Pcs Drill Bit Set

9.4/10
The great companies don't stop making great products time and again. IRWIN is of them. So this is a marvel by IRWIN. It is one of the best drill bits on the market right now. It consists of 29 pieces, and all designed and engineered to provide an excellent drilling experience.

The drill bits are highly customizable and available in a variety of piece count. The dimension of the item is 12 x 7.5 x 4 inches.

Product Features

Drilling Capacity:

The drill bits are made up of M-35 cobalt alloy that contains 5% cobalt. This makes it heat and scratch-resistant. The bits are designed to last longer and perform excellently in heavy-duty tasks.

The drill is designed with a 135-degree split point to relax the drill operator and reduce extra pressure during drilling. Overall it provides a good drilling experience for heavy and lighter tasks.

Detailed Design:

Talking about the design, IRWIN didn’t leave any unsatisfactory fractions there. It has a spiral flute type and is made up of cobalt alloy. The finish is durable, and bits are nicely arranged in a metal box and organized for easy access.

The weight is also handy, i.e., 4.45 pounds. In General, it’s an excellent product for DIYers and metal workers. The straight shank can fit easily in a variety of drills.

Pros
  • Durable M-35 cobalt (high-speed steel) design finish
  • 135-degree split point for reduced feed pressure
  • Particular metal casing for easy ordered storage
  • Straight shank fit
  • Heat and scratch resistant durable, and long-lasting
Cons
  • The latest versions are available and performing better than these

IRWIN Cobalt (316015) 15 Pcs Drill Bit Set

9.4/10
This drill bit set comes in three choices to choose from 15, 21, and 29. Depending on your usage and working conditions, you can select a particular drill bit set.

It's relatively harder to find a branded and satisfying piece of drill bit set at this nominal price. However, the company didn't compromise on the built quality either.

Product Features

Impressive Design:

Speaking of the design, the company has done a great job. Just look at the beautiful black oxide finish made from cobalt underneath. All just in such a fantastic price tag. That’s awesome! Indeed it is.

Extremely Durable:

Indeed, the designers have paid an equal amount of attention to the engineering of this drill bit. Like its design, it is also engineered stunningly.  It includes a 135-degree split point. The material is extremely durable and made to last long. The built quality is good, and the drill bit is ideal for all drilling tasks.

Pros
  • Durable cobalt design finish
  • 135-degree split point for reduced feed pressure
  • Beautifully designed
Cons
  • The cutting edges may wear out after some time. P.S it can be sharpened to turn into new

Dewalt DW1263 14-Piece Cobalt Drill Bit Set

9.4/10
Speaking of Dewalt's DW1263, it has a clean design. The drill bit set has 14 high-quality drill bits and is sold at a reasonable price tag. Whether you want to drill stainless steel or even metal, the Dewalt drill bit set has got you covered.

Product Features

Pilot Pointed Tips:

Somewhat the most impressive thing about this drill bit set is that it comes with pointed pilot tips. The advantage of having these pilot pointed tips is that the drill bit immediately bites the surface and starts piercing right away as soon as you start drilling. 

The way it provides the drilling experience is fantastic. Yes, trust us, you will feel twice as happy when you will recall the price you bought these sets.

Handy And Tough Casing:

Well, these little yet chewy drill bits are housed in a handy, heavy-duty case that is extremely easy and super cool to carry. It’s made from the finest quality industrial-grade ABS material and is super durable. It firmly houses 14 drill bits and has dimensions of 19.1 x 11.4 x 2 centimeters. All these branded features come in a decent and much nominal price tag.

Pros
  • Tough cobalt design finish
  • The pilot pointed tips for more accuracy and
  • cleaner drilling holes
  • Heavy-duty yet handy case to carry drill bits
  • Value for money
Cons
  • Less number of drill bits. You may need some unique drilling bit that you may not find with this set, but it happens in very rare cases

Bosch TI9IM 9 Pc. Titanium Drill Bit Set

9.2/10
Nothing can beat a branded product, and things get much more enjoyable when we get all that in a very nice price range. So the Bosch drill bit set that we will be reviewing today comes in two configurations. i.e., five pcs and nine pcs.

Here we will be reviewing the nine pieces set. This drill bit set comes in a very cheap price tag. The design is super durable, and the built quality is stunning.

Product Features

Titanium Built:

Nothing can beat the class of titanium drill bit finish. The built material adds to this bit set’s durability, yet it also adds to the classical gold finish. The price is not much different for the two configurations. So get a 9-bit configuration, even if you have to pay the very minimal difference.

Excellent Performance:

It comes with a no-skate-tip, which provides a very accurate start, and with that, you get clean and responsive drilling. The drill bits are made for heavy-gauge and high-carbon steel drilling experience. The story doesn’t end there!

The drill bits have a long design that reduces the motor torque by providing more motor power performance. The best part is that these drill bits are for impact driver as well. They are designed to work with impact as well as simple drills.

If you want to perform a heavy-duty drilling activity with these bits on some tougher surface, do read our comprehensive guide on drilling into bricks. You may find some useful information.

Pros
  • Titanium design finish
  • No skate tip
  • Heavy-duty drill bits
  • Long bits for effective drilling
  • Shanks designed to work with impact drivers and drills.
Cons
  • No proper casing

Dewalt (DW1177) 20-Piece Drill Bit Set

9.4/10
Depending on the customer's need, they can choose between 5 different drill bit configurations. i.e. 13,14,16,17 and 20 pieces. The material used is metal and black oxide, and the drill bits are organized in a rigid plastic container. The color of these drill bits is black and gold. The item weighs 1.7 x 9 x 9 inches.

Product Features

Casing And Spiral Flute Design:

The drill bits are stored in a tough case made up of plastic and are indexed for easy organization of these drill bits. The drill bits are in black and gold finish. Overall the design is quite simple, and you might not find any fancy attention-grabbing features on this drill bit set. 

The tools have a spiral flute design that enhances the entire drilling experience. The casing also includes a sliding grip-lock that keeps the drill bit safely closed in a container.

Ease To Use:

The complete design is straightforward, and the drill bits are easy to use. The product uses a 135-degree split point for less feed pressure and reduces bit slipping. In short, it holds the drill bits firmly at their place.

Pros
  • Metal design finish
  • Sliding soft grip
  • Nice finish
  • Includes hard container 
  • 135-degree split point design
Cons
  • No comfort/ add-on feature

Short Buyer Guide:

So in the above analysis, we have listed the ten best drill bits for hardened steel bolts. Now it’s the choice of the user to decide what specifications are best suitable for them. However, they need to see and consider a few of the points before buying the drills listed above.

  • Built Quality
  • Number Of Pieces
  • Suitable Pieces
  • Price 
  • Design 
  • Weight And Size Of The Drill bits
  • Material
  • Sizes
  • And Most Importantly, the Machine’s Power Description.

If you want to buy some reliable power tool combo tool kit, we have assembled a list best power tool combo kits that are available in the market.

Frequently Asked Questions

What is the best drill bit for hardened steel?
Well, that's purely the user's choice and how the specification suits them—however, the Drill America KFD29J 29 Pcs, high-speed steel drill bit set is our top pick.
What is the best drill bit's material for ideal use?
That depends on you and your use. For everyday household use, the cobalt steel drill material is best suited and fulfills most of the needs. However, if you want something more durable and long-lasting, go for the high-speed steel or titanium finish. This would undoubtedly cost a few more bucks but trust us, and it's worth it!
Does the length of the drill bit count?
Yes, indeed, it does count. And this will affect the power of the motor. i.e., the right size for the right place will improve the performance and effectiveness of the motor because the right size will take less physical and motor power during work.

Conclusion:

In the above article, we have enlisted the ten bestseller drill bit sets. There may be more to the list, yet the ones listed are mighty and have the best ranking and proven performance.

Don’t forget to read our short buying guide as it contains a shortlist of features that you must look at before buying that product. The user can choose from those mentioned above according to their needs and requirements.

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