Why I Switched to Left Hand Drill Bits for Hardened Steel: My Expert Experience and Tips

As a DIY enthusiast and seasoned mechanic, I’ve often found myself facing the challenge of drilling into hardened steel. It’s a tough material that can easily frustrate even the most skilled tradespeople. That’s when I discovered the remarkable world of left hand drill bits. These unique tools not only make the task easier but also offer a clever solution for removing broken screws and bolts lodged deep within stubborn materials. In this article, I’ll delve into the fascinating benefits and applications of left hand drill bits for hardened steel, sharing insights that can transform your approach to drilling. Whether you’re a professional or just starting your journey in metalworking, I believe this exploration will equip you with the knowledge to tackle your projects with confidence and precision. So, let’s uncover the potential of these innovative tools and how they can elevate your craftsmanship to new heights.

I Personally Tried Out The Left Hand Drill Bits For Hardened Steel And Here Are My Honest Recommendations

1. Drill Hulk 7-Piece M35 Cobalt Left Hand Drill Bit Set for Removing Damaged Bolts and Screws, 5/64-Inch, 7/64-Inch, 5/32-Inch, 1/4-Inch, 19/64-Inch

When it comes to tackling tough jobs around the house or in a professional setting, having the right tools can make all the difference. That’s why I find the Drill Hulk 7-Piece M35 Cobalt Left Hand Drill Bit Set to be an excellent addition to any toolkit. This set is specifically designed for removing damaged bolts and screws, which is a common problem that can derail projects. If you’ve ever struggled with a stripped screw or a broken bolt, you’ll appreciate the unique features of this set that are tailored to address these challenges.

One of the standout features of this drill bit set is its stubby mechanics length and 135-degree split point. This design helps reduce drill walking, ensuring that I can start my drilling precisely where I intend to. The straight shank further aids in stability, which is crucial when dealing with tricky fasteners. I find that this stability translates into more accurate drilling, thus saving me time and effort in the long run.

Moreover, the materials used in the Drill Hulk set are noteworthy. Made from high-speed steel with 5% cobalt, these bits are engineered for higher heat resistance and durability. This means that they can withstand the rigors of heavy use far better than typical high-speed steel (HSS) drill bits. If I’m dealing with particularly tough materials or prolonged drilling sessions, the cobalt content ensures that the bits maintain their performance without overheating or dulling quickly.

Another impressive aspect is the ability to repeatedly sharpen these bits without damaging their cutting edge. The uniform hardness throughout the cobalt material allows me to maintain the sharpness of the bits over time, which is a significant advantage. Unlike standard HSS bits that tend to wear out after just a few sharpenings, these cobalt bits can be sharpened multiple times, making them a cost-effective choice for anyone who frequently encounters damaged fasteners.

The application of this drill bit set is straightforward it’s best used for removing damaged bolts and screws, or for drilling pilot holes for screw extractors. This versatility makes it a useful addition to any mechanic’s toolbox, DIY enthusiast’s workshop, or even for home repairs. The set includes a range of sizes—two pieces each of 5/64 inch and 7/64 inch, along with one piece each of 5/32 inch, 1/4 inch, and 19/64 inch—ensuring that I have the right bit for various jobs at hand.

Ultimately, the Drill Hulk 7-Piece M35 Cobalt Left Hand Drill Bit Set stands out as a well-crafted and highly functional tool set. It addresses specific needs that many of us face in maintenance and repair tasks. With its durable construction, ease of use, and the ability to be repeatedly sharpened, this set not only enhances my toolkit but also offers great value for money. If you often find yourself dealing with stubborn screws and bolts, I genuinely believe that investing in this drill bit set will save you time, effort, and frustration in the long run. Don’t let damaged screws hold you back; equip yourself with this robust set and tackle those projects with confidence!

Feature	Detail
Stubby Mechanics Length	Reduces drill walking, straight shank for stability
Material	High-speed steel with 5% cobalt for heat resistance
Sharpening	Can be repeatedly sharpened without damaging the cutting edge
Application	Best for removing damaged bolts and screws or drilling pilot holes
Included Sizes	2pcs 5/64 inch, 2pcs 7/64 inch, 1pc 5/32 inch, 1pc 1/4 inch, 1pc 19/64 inch
Case Included	Yes, for easy storage and organization

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2. NEIKO 10038A Left-Hand Drill-Bit Set, High-Speed Steel Drills with Titanium Nitride Coating, Reverse-Twist Drill Bits, SAE Sizes, 13-Piece Set

I recently came across the NEIKO 10038A Left-Hand Drill-Bit Set, and I must say, it’s an impressive tool that every DIY enthusiast and professional should consider adding to their toolkit. This 13-piece set is not just a collection of drill bits; it’s a carefully designed solution for those challenging situations where conventional drilling falls short, particularly when dealing with broken fasteners or screws. The unique left-hand design is a game-changer, making it easier to extract stuck or broken screws without damaging the surrounding material.

The features of these drill bits stand out remarkably. Each bit is made from high-speed steel and comes with a titanium nitride coating. This means that not only do they boast a high surface hardness, but they also reduce friction as they cut through tough materials. I appreciate that the 135-degree split point design allows for precise self-centering, which translates to cleaner, more accurate holes. This is particularly important when I’m working on delicate projects or when precision is non-negotiable. With these drill bits, I can expect faster cutting speeds and the ability to clear chips and particles efficiently, which further enhances the overall drilling experience.

One of the things I find most beneficial about this drill-bit set is its versatility. The left-hand design is not something you come across often, and it’s specifically tailored for use with reversible drills. This makes it an essential tool for anyone who frequently tackles home repairs, automotive projects, or even professional work where broken fasteners can be a real headache. The ability to easily remove broken screws, bolts, and studs without resorting to more invasive measures saves time and frustration.

Another aspect that caught my attention is the organization of the set. The drill bits come neatly arranged in a high-impact metal index storage case, which not only adds a touch of durability but also makes it easy to keep everything organized. I hate rummaging through a messy toolbox, and with this set, each bit has its own designated slot for quick identification. This thoughtful design feature ensures that I can easily find the right size when I need it, making my work process more efficient.

Here’s a quick summary of the key features of the NEIKO 10038A Left-Hand Drill-Bit Set

Feature	Description
Material	High-speed steel with titanium nitride coating for durability and reduced friction
Design	Left-hand twist drill bits ideal for extracting broken fasteners
Tip Design	135-degree split point for precise self-centering and increased cutting speed
Storage	Comes in a high-impact metal index case for organization and portability
Set Size Options	Available in 5-piece, 13-piece, and 15-piece SAE sets

I genuinely believe that the NEIKO 10038A Left-Hand Drill-Bit Set is a worthwhile investment for anyone who values quality tools. The combination of high-speed steel, titanium nitride coating, and a practical left-hand design makes these bits not only effective but also incredibly versatile. Whether you’re a weekend warrior tackling home improvements or a professional working in an automotive garage, this drill-bit set can significantly enhance your efficiency and effectiveness. Don’t hesitate to add this set to your toolbox; I assure you, it will pay off in the long run!

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3. Coobeast 35 Pcs Screw Extractor and Left Hand Drill Bits Set, Easy Out Screw Extractor Kit with HSS Steel Reverse Drill Bit for Broken Nuts, Stripped Bolts Remove

I recently came across the Coobeast 35 Pcs Screw Extractor and Left Hand Drill Bits Set, and I must say, it’s an impressive tool kit that any DIY enthusiast or professional mechanic would love to have in their arsenal. This comprehensive set is designed to tackle the often frustrating task of removing broken nuts and stripped bolts, which we all know can be a real headache. The combination of high-quality materials and thoughtful design makes this a standout choice for anyone looking to simplify their repair tasks.

The versatility of this kit is remarkable. With 35 pieces that include 16 left-hand cobalt drill bits, 13 multi-spline screw extractors, and 6 spiral screw extractors, this set is equipped to handle a wide range of maintenance tasks. Whether I’m working on my car, doing home repairs, or tackling a mechanical project, I can easily find the right tool for the job. The inclusion of both left-handed drill bits and various types of extractors means that I can address most issues without needing to search for additional tools. This is a huge time-saver and a great addition to any toolset.

One of the standout features of this kit is the precision and sharpness of the drill bits. Made from high-speed steel with a titanium coating, the bits are not only durable but also enhance hardness and wear resistance. The 135° angle design allows for easier penetration into the workpiece, significantly reducing axial resistance. This means that when I’m trying to remove a stubborn bolt, I can do so without damaging the surrounding areas, making the entire process smoother and more efficient.

The multi-spline screw extractors are another highlight of this set. Made from chromium-molybdenum steel, these extractors are tougher and more durable than standard options. The laser etching on the extractors makes it easy to identify the right size for the job, and they are designed to match the left drill bits perfectly. This thoughtful design allows me to quickly select the appropriate extractor for removing broken or damaged bolts, which is particularly useful in tight spaces. It’s all about efficiency, and this kit delivers.

Additionally, the spiral screw extractors provide an extra layer of functionality. With 6 different sizes, these extractors can reach deeper into spaces to remove stubborn bolts and screws. The spiral flutes are designed to grip as resistance increases, which means I can confidently tackle even the most embedded and challenging fasteners. This kind of reliability is essential, especially when working on complex projects where every second counts.

What I really appreciate about the Coobeast toolset is the sturdy and reliable storage case. The blow-molded case keeps all the bolt removers organized and prevents loss, which is a common issue with smaller parts. Knowing that I have everything I need in one place gives me peace of mind and allows me to focus on the task at hand without worrying about misplacing tools.

Finally, I cannot overlook the quality assurance provided by Coobeast. With a commitment to customer service, they encourage users to reach out if there are any issues with the product. This level of support adds an extra layer of confidence in my purchase. It’s not just about having a great tool; it’s about knowing that the company stands behind its product and is ready to assist if needed.

In summary, the Coobeast 35 Pcs Screw Extractor and Left Hand Drill Bits Set is a fantastic investment for anyone involved in mechanical maintenance, automotive repairs, or general home improvement projects. Its versatility, precision, and quality make it an invaluable addition to any toolkit. If you’re tired of struggling with broken bolts and stripped screws, I highly recommend considering this set. The time and frustration it can save you are well worth the investment!

Feature	Description
Versatile Combination	35 pcs including left-hand cobalt drill bits, multi-spline, and spiral screw extractors.
Precision & Sharpness	High-speed steel with titanium coating for enhanced hardness and wear resistance.
Multi-Spline Screw Extractors	13 pcs made of Cr-Mo for higher hardness; easy size identification.
Spiral Screw Extractors	6 sizes to reach deeper spaces; spiral flutes increase grip.
Sturdy & Reliable	Heavy-duty blow molded case for organization; quality assurance provided.

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4. NordWolf 5-Piece M35 Cobalt HSS Left Hand Drill Bit Set, Reverse Twist with 1/4″ Hex Shank for Screw Extractors, SAE Sizes 5/64″-7/64″-5/32″-1/4″-19/64″ in Storage Case

When it comes to tackling those pesky, stripped screws and bolts, I’ve found that having the right tools can make all the difference. That’s why I’m excited to share my thoughts on the NordWolf 5-Piece M35 Cobalt HSS Left Hand Drill Bit Set. This set not only offers a selection of high-quality drill bits but also provides features that cater perfectly to anyone who frequently deals with damaged fasteners. Let’s dive into what makes this set stand out!

First and foremost, the high quality of the M35 cobalt alloy high-speed steel used in these drill bits cannot be overstated. This material is renowned for its exceptional heat resistance, which means that I can push these bits to their limits without worrying about them warping or losing their cutting edge. I appreciate that the drill bits can be sharpened repeatedly, ensuring long-term usability without sacrificing performance. For anyone like me, who values durability in their tools, this is a significant plus.

The efficient design of these bits is another feature that I find incredibly useful. The reverse twist, left-hand design is specifically engineered for drilling pilot holes for screw extractors, making the process of removing damaged screws and bolts not just simpler but also more effective. I can confidently say that this design is a game changer for anyone who has ever struggled with a stripped screw. It’s like having a secret weapon in my toolkit!

Convenience is key in any tool, and the 135° split point drill tip allows for easy penetration without walking off. This feature has saved me a lot of frustration, as I no longer need to worry about misalignment or slippage when starting a hole. Additionally, the 1/4-inch quick exchangeable hex shank makes loading these bits into drills and impact drivers a breeze. I love that I can switch between bits quickly, which is essential when I’m in the middle of a project.

The set includes popular imperial sizes 5/64″, 7/64″, 5/32″, 1/4″, and 19/64″. This range ensures that I have the right bit for almost any job I encounter, from small repairs to more significant projects. Having these sizes readily available in one set means I can be more efficient and less stressed when tackling various tasks.

Finally, the unique packaging of this set deserves a shout-out. The drill bits come in a specially designed plastic box that not only keeps everything organized but also has imprinted sizes for easy identification. The sliding clip on the backside of the box allows me to hang it on pegboards, keeping my workspace tidy. This thoughtful design feature helps me find the right bit quickly, saving me precious time when I’m knee-deep in a project.

the NordWolf 5-Piece M35 Cobalt HSS Left Hand Drill Bit Set is an indispensable addition to my toolkit. The combination of high-quality materials, efficient design, and convenient storage makes it a smart choice for anyone who frequently encounters damaged screws and bolts. If you’re looking to enhance your tool collection and make repairs easier, I genuinely recommend considering this set. It’s an investment that will pay off in time saved and headaches avoided!

Feature	Description
Material	M35 Cobalt Alloy High Speed Steel for heat resistance and durability
Design	Reverse twist, left-hand drill bits for effective screw extraction
Tip	135° split point drill tip for easy penetration
Shank	1/4-inch quick exchangeable hex shank for easy loading
Sizes Included	5/64″, 7/64″, 5/32″, 1/4″, 19/64″
Storage	Plastic box with imprinted sizes for easy identification

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Why Left Hand Drill Bits for Hardened Steel are a Game Changer for Me

As someone who frequently works with metal, I’ve encountered my fair share of challenges, especially when it comes to drilling through hardened steel. Traditional drill bits often struggle with this tough material, leading to broken bits and wasted time. That’s where left hand drill bits come into play. I discovered that these specialized bits not only make the drilling process easier but also save me from the frustration of dealing with stubborn bolts and screws.

One of the most remarkable benefits I’ve experienced with left hand drill bits is their ability to remove broken fasteners. When I accidentally snap a bolt while working, it can be a real headache. However, using a left hand drill bit allows me to drill into the broken piece in reverse. This unique design often helps to unscrew the broken fastener as I drill, turning a potentially disastrous situation into a straightforward fix. It’s incredibly satisfying to see a problem resolved with such an effective tool.

Moreover, left hand drill bits are specifically designed to handle the toughness of hardened steel. I’ve found that their robust construction allows me to drill through this challenging material without the fear of damaging my tools. This durability not only boosts my confidence while working but also

Buying Guide for Left Hand Drill Bits for Hardened Steel

Understanding Left Hand Drill Bits

When I first encountered left hand drill bits, I was intrigued by their unique design. Unlike traditional drill bits that rotate clockwise, left hand drill bits rotate counterclockwise. This feature makes them particularly useful for removing broken screws and bolts, especially when working with hardened steel.

Why Use Left Hand Drill Bits for Hardened Steel?

I quickly learned that hardened steel presents a challenge for standard drill bits. The toughness of the material can lead to wear and tear, resulting in ineffective drilling. Left hand drill bits, however, are designed to handle this toughness. Their ability to grip and extract broken fasteners makes them an essential tool in my workshop.

Material Matters

When I began looking for left hand drill bits, I realized the material of the bits is crucial. High-speed steel (HSS) is a common choice, as it offers durability and heat resistance. I also found cobalt steel drill bits to be effective, as they have higher heat resistance and can handle tougher materials, which is ideal for hardened steel.

Sizes and Sets

I discovered that left hand drill bits come in various sizes. It’s essential to have a range of sizes available, as different projects require different bit diameters. I recommend considering a set that includes multiple sizes, so I am prepared for any situation that arises.

Coating for Performance

While exploring options, I noticed that some left hand drill bits come with coatings like titanium or black oxide. These coatings can enhance the bit’s performance by reducing friction and increasing durability. I found that investing in coated bits can lead to a longer lifespan and better results, especially when drilling into hardened steel.

Spiral Flute Design

The design of the drill bit is another aspect I considered. A spiral flute design aids in chip removal, which is crucial when drilling into tough materials. I prefer bits with a deeper spiral, as they tend to provide better clearance for debris, allowing for smoother drilling.

Drilling Technique

As I learned more about using left hand drill bits, I realized that technique matters just as much as the tool itself. I found that using steady pressure and the correct speed can significantly affect the outcome. Slower speeds tend to yield better results with hardened steel, preventing overheating and bit damage.

Price vs. Quality

Lastly, I came to understand the balance between price and quality. While it’s tempting to opt for cheaper options, I found that investing in higher-quality left hand drill bits pays off in the long run. I have experienced the frustration of using inferior bits that break or wear out quickly, so I now prioritize quality over cost.

In my journey to find the right left hand drill bits for hardened steel, I learned that several factors come into play. From understanding the unique design and materials to considering size, coating, and technique, each element contributes to successful drilling. By taking the time to choose wisely, I can tackle any project that involves hardened steel with confidence.

Author Profile

Sandra Rowe

Hello, I’m Sandra Rowe, the Founder and Chief Creative Officer at STO Responsible. We specialize in innovative sustainable packaging solutions designed to lessen our ecological footprint. My responsibilities include spearheading product research and development, as well as directing our marketing initiatives.

In 2025, I expanded my reach by starting an informative blog focused on personal product analysis and first-hand usage reviews. Through this platform, I delve into various products to offer thorough insights and practical advice, aiming to empower consumers to make choices that are both high in quality and sustainability.

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