List of Top 10 Best Drill Bits For Hardened Steel

Bestseller No. 1
Cobalt Drill Bit Set - 13 Piece M35 Cobalt Drill Bits with Storage Case - Perfect Drill Bits for Metal, Hardened & Stainless Steel, Cast Iron, and More!
  • SET OF 13 COBALT DRILL BITS - In the following imperial sizes 1/4", 15/64", 7/32", 13/64", 3/16", 11/64", 5/32", 9/64", 1/8", 7/64", 3/32", 5/64", 1/16"
  • M35, Fully Ground, 135° Split Point - Our Drill Bits Contain 5% Cobalt, Are Fully Grounded for a Precision Drilling Diameter. 135° Split Point Design Makes it Easier to Drill Repeated Holes in Harder Materials.
  • PLASTIC STORAGE CASE INCLUDED - Incredibly Tough and Durable Plastic Case. Perfect for Keeping Your Cobalt Drill Bits Neatly Organized and Safe.
  • COBALT DRILL BITS ARE THE PERFECT DRILL BITS FOR METAL - As well as other hard materials such as Stainless Steel, Hardened Steel, Cast Iron, Bronze, Titanium, and More!
  • LIFETIME GUARANTEE - Here at Owl Tools (USA Based Company) we only care about your satisfaction. We try our best to ensure each product is in perfect condition before you get it, but if something is not up to your satisfaction, please contact us for a full refund or replacement.
SaleBestseller No. 2
DEWALT Titanium Nitride Coated Drill Bit Set, Pilot Point, 21-Piece (DW1361)
  • DEWALT drill bit set has connectable accessory storage system to optimize storage space
  • Patented bit-bar design of the drill bits set allows easy removal of bits and customizable placement
  • Clear lid of the Titanium Nitride Coated drill bit set allows you to easily see contents at glance
  • Clip latch for secure closing
  • Small Bulk Storage size fits inside the Small and Medium ToughCase plus (sold separately) - Ideal for organizing loose bits
SaleBestseller No. 3
BOSCH CO14B 14 Pc. Cobalt M42 Drill Bit Set
  • 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
  • Enhanced M42 alloy material – contains 8% Cobalt alloy that delivers 10x life vs. Standard bits
  • High-heat resistant bits – withstand high-temperature applications for extended periods of time
  • Thick web-helix design – provides additional stability in tough applications
  • Surface-hardened tip – penetrates tough abrasive materials
SaleBestseller No. 4
COMOWARE Cobalt Drill Bit Set- 21Pcs M35 High Speed Steel Twist Jobber Length for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with Metal Indexed Storage Case, 1/16"-3/8"
  • 21 PIECES INCLUDED: 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".
  • HSS WITH 5% COBALT: Durable, Higher Heat & Abrasion Resistance.
  • PRECISE 135°SPLIT POINT & TWIST DESIGN: Prevent walking, clear chips and particles faster.
  • PROFESSIONAL & WIDELY USE: M35 Cobalt HSS is more suitable for hardened material. Particularly successful in cutting through hard metals such as stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics and woods, and also can be used for softer materials.
  • ORGANIZED HOLDER: Set includes the drill bit holder with size index for easy storage and organizing.
Bestseller No. 5
BeHappy Drill Bit Set 29pcs, M35 Cobalt Drill Bit Set, High Speed Steel Twist Drill Bit Set for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with Indexed Storage Case, 1/16"-1/2"
  • 🔨【VARIOUS SIZES】: 29 sets of drill bits include 1/16 inch, 5/64 inch, 3/32 inch, 7/64 inch, 1/8 inch, 9/64 inch, 5/32 inch, 11/64 inch, 3/16 inch, 13/16 inch, 13/16 inch, 13/16 inch 1 inch. 7/32 inches, 15/64 inches, 1/4 inches, 17/64 inches, 9/32 inches, 19/64 inches, 5/16 inches, 21/64 inches, 11/32 inches, 23/64 inches, 3/20 inches 2 inches 5/64 inches, 13/32 inches, 27/64 inches, 29/64 Inches, 15/32 inches, 1/2 inches, can meet more needs.
  • 🔨【HSS DRILL BIT SET】: HSS cobalt drill set is suitable for hardened steel and has excellent cutting performance. 29 sets of drill bits can be used for a long time. The blades are hardened and polished to improve sharpness, and precise cutting does not shake.
  • 🔨【FEATURES of M35 COBALT】: M35 cobalt drill bit set can effectively drill tough and high tensile strength materials. The drill bit is especially suitable for cutting hard metals, such as stainless steel, cast iron, super alloys, titanium alloys, hard plastics and wood. It can also be used in soft materials.
  • 🔨【135 DEGREES POINTS】: Cobalt drill bit set can be effectively used for most hard and soft objects, 135 degrees point nib and twist design, improve cutting speed, self-centering, prevent walking, speed up the removal of debris and particles.
  • 🔨【STORAGE RACK】: The cobalt drill bit set includes a drill rack with a size index, which is convenient for storage and organization. The drill set is suitable for most brands on the market. Reliable quality and considerate service. If you have any questions, please feel free to contact us, we will serve you wholeheartedly.
Bestseller No. 6
Lichamp 29PCS HSS Cobalt Drill Bits Set 1/16" to 1/2" with Three Flute for Hard Metal, Hardened Stainless Steel and Cast Iron
  • UNIQUE 3X FLUTE DESIGN - Lichamp three flute patent design drill bit clears chips and particles faster, provide you with more efficient drilling experience.
  • 4X LIFESPAN MATERIAL - Made from industrial grade M35 high-speed steel with 5% cobalt provides hardness for wear resistance, withstands max 1100 degreeF.
  • MULTIPLE APPLICATION - Ideal for drilling in heavy-duty tough metal, including hard abrasive alloy metal, hardened stainless steel or cast iron.
  • SMOOTHLY DRILLING - 135-degree split point tip & twist design increases cutting speed with self-centering and prevents skating starts or walking.
  • 29PCS DRILL BIT SET - Metal index case with size chart for easy bit access and identification. Includes drill bit sizes 1/16-inch to 1/2-inch in 1/64-inch increments.
SaleBestseller No. 7
IRWIN Drill Bit Set, M35 Cobalt Steel, 29-Piece (3018002)
  • 29 Piece
  • Cobalt Drill Bit Set
  • Sizes 1/16 inch -1/2 inch in 1/64 inch increments, 135 Degree Split Point To Minimize Walk
  • 5% Cobalt For Higher Heat & Abrasion Resistance
  • Heavy Duty Web Construction For Strength & Durability
SaleBestseller No. 8
DEWALT Drill Bit Set, Titanium Nitride Coated, 14-Piece (DW1354) , Yellow
  • Connectable accessory storage system to optimize storage space of the drill bits for wood, metal and plastic
  • Patented bit-bar design of the drill bits allows easy removal of bits and customizable placement
  • Clear lid allows you to easily see contents at glance
  • DEWALT drill bit set comes with clip latch for secure closing
  • Small Bulk Storage size fits inside the Small and Medium ToughCase plus (sold separately) - Ideal for organizing loose bits
Bestseller No. 9
2/Pack Solid Carbide Drill Bit for Hardened Steel Hard Ness HRa 91.3 Aerospace Standard K20 Tungsten Carbide Jobber Length Twist Drill for Metal 118 Degree Four Facet Point Fractional Size (3/32")
  • ★【Premium Bright Finish 2/Pack】 multi-purpose solid carbide drill bits provide better rigidity than high speed steel bits. It is extremely heat resistant and used for high speed applications. Our tungsten carbide (WC) bits has the advantage of cutting metal either "wet" or "dry" and they provide solutions for many businesses such as aerospace drilling jobs for aircraft mechanics, precision machining, hobby supply, etc.
  • ★【Recommended For Use On】 aircraft metals chrome titanium inconel stainless steel Alloys Steel Low-Medium-High Carbon Steel Aluminum Copper Glass Plastics Composite Materials Cast Iron -- Our Carbide drills stay sharp many times longer than traditional steel bits making them ideal for the toughest of applications!
  • ★【Optimal Design for Metal Work】 118° four facet point angle minimizes drill wander and assures accurately sized holes. Our jobber length, precision ground carbide drills are designed for high feed rates with good chip disposal. smooth finish on the bits increases chip flow. Spiral flutes are constructed with a higher flute angle to remove chips more easily.
  • ★【Specs】 Tungsten Carbide Grade (ISO): K20 / Binder: %8 Cobalt / Hardness: 91.3 HRa / Uncoated / Flute Length: 1 inch, Overall Length: 2 inch, Drill Size: 3/32 inch
  • ★【IMPORTANT, PLEASE READ BEFORE BUYING】 tungsten carbide or cemented carbide is a composite material, although it looks like a metal, it is a composite of Tungsten carbide powder mixed with cobalt as a binder metal and the resulting material is more like a ceramic than a metal. It is a very hard material being a 9 on the Mohs scale where diamond is a 10, quartz a 7 and hard steel around 4.5. Due to its hardness, it will chew down into most anything But that hardness makes them brittle on side lo
Bestseller No. 10
Drill America - DWD29J-CO-PC 29 Piece M35 Cobalt Drill Bit Set in Round Case (1/16" - 1/2" X 64ths), DWDCO Series
  • Set of 29 jobber length drill bits includes inch sizes 1/16" to 1/2" in 1/64" increments
  • Cobalt steel provides extended tool life compared to high-speed steel drill bits when drilling hard materials
  • 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
  • Meets ANSI specifications

Buyer’s Guide

How to choose the
best drill bits for hardened steel

What is the Purpose Of Drill Bits For Hardened Steel?

Drill bits are small metal tools which are designed to be attached to drills. There are many different types of drill bits available, each suited to specific applications. Some common uses include drilling holes into materials such as concrete, masonry, brickwork, plasterboard, drywall, timber, plastic sheeting, etc., while others are specifically designed for cutting metals (e.g. stainless steel).

Types of Drills & Drill Bit Types

There are two main types of drills – corded and battery-operated. Corded drills require a power source connected via a cable, whereas battery-powered drills operate using rechargeable batteries. Both types of drills are suitable for most general DIY projects, although corded drills are generally preferred due to their greater versatility.

Corded vs Battery Powered

Battery powered drills are typically lighter and easier to handle than corded models, making them ideal for light duty jobs where weight isn’t important. However, corded drills are capable of delivering higher torque levels, meaning they can cut harder materials faster. As a result, corded drills are commonly favoured for heavy duty applications such as plumbing, carpentry, construction, and demolition.

Common Uses For Drill Bites

The following list includes examples of typical applications for both corded and battery operated drills. Note that these lists aren’t exhaustive – there are literally thousands of possible uses for drill bits!

Cutting Concrete/Stone

Pouring Masonry Walls

Plaster Board Cutting

Dry Wall Cutting

Timber Cutting

Metal Cutting

Stainless Steel Cutting

Woodworking Projects




Garden Tools

Handyman Tools



Power Tool Accessories


Sawmill Equipment

The Importance of Purchasing Quality Drill Bits For Hardened Steel

Drill bits are essential tools for most DIY projects. However, there are many types of drill bits available today, each designed for different purposes. Choosing the right type of drill bits depends largely upon the material being drilled into. In addition, choosing the correct size drill bit depends on the diameter of the hole required. Here we discuss the benefits of using hardened steel drill bits versus regular drill bits.

Benefits of Using Drilled Holes Made From Hardened Steel

Hardened steel drills last longer than standard drills because they resist wear caused by drilling holes in hard materials.

They are stronger than normal drills because they contain harder metal particles within the matrix of the drill body.

Because they are harder than normal drills, they cut faster and require fewer revolutions per minute (RPM) to achieve the same depth of penetration.

Hardened steel drills are easier to sharpen than normal drills.

How To Select The Right Size Drill Bit

There are two main factors which determine the size of the drill bit needed for a particular project. First, the diameter of the hole required determines the size of the drill bit needed. Second, the hardness of the material being drilled affects the durability of the drill bit. Generally speaking, softer metals require smaller drill bits while harder metals require larger drill bits.

Types of Drill Bites Available Today

Today, there are three main categories of drill bits available. Each category has its own advantages and disadvantages. We’ll briefly describe these categories here.

Standard drill bits – Standard drill bits are typically made from high carbon steel. They are inexpensive and easy to obtain. Because they are cheap, they are widely used for general household applications. However, they lack strength and durability compared to hardened steel bits.

Hardened steel drill bits – These drill bits are generally made from stainless steel. They are strong and durable, making them ideal for heavy duty applications. However, they are relatively expensive and difficult to obtain.

Diamond drill bits – Diamond drill bits are manufactured from synthetic diamonds. They are extremely sharp and very effective for cutting tough materials such as concrete and stone. Unfortunately

Drill bits are very important tools which are used in drilling holes into hard materials. There are many types of drills available in the market today. Each type has its own unique features and benefits. So, choosing the right drill bits is essential for getting good results. Here we discuss some of the most common features to be considered while purchasing drill bits.


The size of the drill bits depends upon the material being drilled. Smaller sized bits are generally used for softer materials whereas larger bits are required for harder ones. Generally speaking, smaller bits are easier to handle and control. However, bigger bits give better penetration rate and hence faster drilling speed.


There are different kinds of shape available in the market. Round shaped bits are commonly used for drilling round objects. Whereas square bits are preferred for drilling flat surfaces. Other shapes include triangular, hexagonal etc.


Different types of materials are used to manufacture drill bits. Some of these materials include carbide, tungsten carbide, ceramic, stainless steel, titanium etc. Carbide bits are widely used because of their high hardness and durability. Ceramic bits are popular among DIY enthusiasts due to their ease of handling and low weight. Stainless steel bits are mostly used for heavy duty applications where toughness and strength are needed. Titanium bits are lightweight and easy to maintain.


Depending upon the application, there are two main finishes available in the market – matte finish and polished finish. Matte finish bits are best suited for general purposes whereas polished bits are ideal for finishing operations. Polished bits are typically smoother and require fewer sharpening cycles compared to matte finished bits.


Most manufacturers claim that their products last longer than others. But, it’s always wise to check the warranty period offered by each manufacturer. Most companies offer warranties ranging between 1 month to 2 years depending upon the product quality and brand name.

It is advisable to go for cheaper options initially. As long as the quality remains consistent, you can upgrade later. Buying cheap drill bits does not necessarily imply poor performance. Many brands sell affordable

Drill bits are essential tools for most jobs around the house. Whether you’re drilling holes into drywall or making repairs to your car, there’s no way you could complete these projects without using a set of drill bits. However, choosing the right type of drill bit isn’t always easy. There are many different kinds available, each designed for specific applications. Here we take a closer look at three common types of drill bits and explain why you should be careful which ones you select.

Standard Bit

The standard bit is probably the most commonly found kind of drill bit. Standard bits are typically made from carbide and tungsten carbide (WC). Carbides are harder materials than WC, meaning they cut faster and last longer. Tungsten carbide has been proven to withstand high temperatures, while still being able to hold its shape. As a result, standard bits are ideal for drilling metal objects, including hardwood floors and concrete walls.


Hardness Shaped Stone (HSS) bits are another popular choice among DIY enthusiasts. HSS bits are manufactured from special stones that are heated and shaped into a variety of useful forms. One example of an HSS bit is the hexagonal stone bit. Hexagonal bits are perfect for cutting sheetrock because they allow you to create straight lines quickly and efficiently. Another advantage of HSS bits is that they are extremely durable. Unlike standard bits, HSS bits aren’t prone to breaking during long periods of continuous use. In fact, HSS bits are known to last decades!

Pilot Bit

Pilot bits are smaller versions of regular drills. Pilot bits are generally used for small precision cuts. Because pilot bits are smaller, they require less force to operate. As a result, pilots are easier to control and maneuver. Additionally, pilot bits are safer than larger models since they reduce the risk of injury caused by flying shrapnel. Finally, pilot bits are cheaper than larger models. While they may seem like a good idea, pilot bits are only recommended for light duty uses. Heavy duty operations such as drilling large holes or removing old nails are best left to professional contractors.

Choosing the Right Tool for the Job

While there are several different kinds of drill bits available, knowing exactly what you’ll be

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