Why I Trust Cobalt Left Hand Drill Bits: My Expert Experience and Recommendations

As I delve into the world of drilling and metalworking, I can’t help but marvel at the essential tools that make our projects not just possible, but precise and efficient. One such tool that has captured my attention is the cobalt left hand drill bit. Designed for those tricky situations where traditional drilling falls short, these bits are more than just metal; they represent a blend of innovation and practicality. Whether you’re a seasoned professional tackling tough materials or a DIY enthusiast looking to expand your toolkit, understanding the unique qualities and advantages of cobalt left hand drill bits can transform the way you approach your projects. Join me as we explore how these specialized tools can elevate your craftsmanship and ensure that no challenge is too daunting to tackle.

I Personally Tested The Cobalt Left Hand Drill Bits 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

I recently came across the Drill Hulk 7-Piece M35 Cobalt Left Hand Drill Bit Set, and I must say, this product truly stands out in the realm of tools designed for those who value efficiency and precision. This set is specially crafted for removing damaged bolts and screws, which can often be a frustrating task for both professionals and DIY enthusiasts alike. With sizes ranging from 5/64-inch to 19/64-inch, this set covers a wide range of needs, making it a versatile addition to any toolbox.

One of the features that immediately caught my attention is the stubby mechanics length and the 135-degree split point design. This design significantly reduces drill walking, which is a common issue when trying to start drilling on a difficult surface. The straight shank ensures better control and stability while working, allowing me to focus on the task at hand without worrying about my drill slipping. This is particularly advantageous when working with damaged or stripped screws, as it can make the difference between a successful extraction and a frustrating failure.

Another impressive aspect of this drill bit set is the material composition. Made from high-speed steel and infused with 5% cobalt, these bits boast remarkable heat resistance. Cobalt steel has a high red hardness, which means that it can withstand elevated temperatures without losing its strength or performance. For me, this translates to a longer-lasting tool that can handle tough jobs without the risk of bending or breaking. If you’ve ever experienced the disappointment of a drill bit snapping during an important project, you’ll appreciate the durability that this set promises.

What I find particularly appealing is the ability to repeatedly sharpen these cobalt drill bits as needed. Unlike standard high-speed steel bits, the hardness of cobalt bits is uniform throughout, enabling them to maintain their cutting edge over time. This feature not only saves money in the long run by reducing the need for frequent replacements, but it also means I can rely on the same set of bits for various projects without compromising on performance. This is a significant advantage for anyone who takes their DIY projects seriously.

The application of this drill bit set is straightforward yet crucial. It is best used for removing damaged bolts and screws, or for drilling pilot holes for screw extractors. This specific application makes it an invaluable tool for mechanics, contractors, and even hobbyists who might find themselves dealing with stubborn fasteners. Whether it’s a car repair, furniture assembly, or home improvement project, having this set on hand can streamline the process and save a lot of time and frustration.

In terms of organization, the set comes with a sturdy case, which is a thoughtful addition that makes it easy to keep everything in one place. This is especially helpful for those of us who like to maintain a tidy workspace. The clear labeling of sizes ensures that I can quickly grab the exact bit I need without rummaging through a disorganized collection of tools.

Here’s a quick overview of the product features in a table format

Feature	Description
Stubby Mechanics Length	135-degree split point reduces drill walking, ensuring better control.
Material	Made from high-speed steel with 5% cobalt for improved heat resistance.
Sharpening	Can be repeatedly sharpened without damaging the cutting edge.
Application	Ideal for removing damaged bolts and screws or drilling pilot holes.
Included Sizes	2x 5/64 inch, 2x 7/64 inch, 1x 5/32 inch, 1x 1/4 inch, 1x 19/64 inch.
Storage	Comes with a sturdy case for easy organization and portability.

Overall, I genuinely believe that the Drill Hulk 7-Piece M35 Cobalt Left Hand Drill Bit Set is a worthy investment for anyone who frequently works with screws and bolts. The combination of durable materials, thoughtful design, and practical applications makes it an essential tool for tackling those pesky fasteners that often cause more trouble than they’re worth. If you want to simplify your projects and improve your efficiency, I highly recommend considering this drill bit set. It’s a small investment that can lead to significant time savings and enhanced results in your work.

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2. MACXCOIP Cobalt Left Hand Drill Bit Set, 13Pcs M35 High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic, with Index Storage Case, 1/16″-1/4″

As someone who appreciates the importance of quality tools, I recently came across the MACXCOIP Cobalt Left Hand Drill Bit Set, and I have to say, it truly stands out in the market of drill bits. This 13-piece set is specifically designed for anyone who frequently works with a variety of materials, from hardened metal to wood, making it an invaluable addition to my toolkit. The versatility of this set is one of its most impressive features, offering drill bits that range from 1/16″ to 1/4″, effectively catering to diverse drilling needs.

The left-hand design is particularly noteworthy. It’s not just a gimmick; this feature allows for the removal of broken screws and bolts when used in conjunction with a screw extractor. I can’t stress enough how often I’ve encountered situations where a stubborn screw has ruined my progress. With this drill bit set, I feel empowered to tackle those pesky issues head-on. The practicality of having left-hand bits means I can approach my projects with more confidence and efficiency.

When it comes to the material, the M35 cobalt steel used in these drill bits is a game-changer. It’s known for its durability and sharpness, making it suitable for cutting through tougher materials like stainless steel and iron castings, as well as softer materials like aluminum and plastic. I appreciate that the manufacturers have focused on creating a tool that doesn’t just perform well under normal conditions but excels when the going gets tough. The ability to work on a variety of surfaces without switching tools constantly is a significant time-saver for me.

Another fantastic feature of the MACXCOIP drill bit set is its quick and efficient design. The 135-degree point tip combined with a twist design allows for faster cutting and self-centering, which means no more frustrating walk-offs that ruin precision. I’ve always valued tools that enhance my productivity, and this drill bit set certainly delivers. The effective chip and particle removal ensures that I can maintain a clean working area, which is essential for safety and efficiency.

Moreover, the HSS (High-Speed Steel) construction provides excellent cutting performance, making this set a reliable option for long-term use. The hardened and polished inserts add to the sharpness and precision of the cuts, minimizing wobbling—a common annoyance with lesser quality drill bits. Knowing that I have a tool that delivers consistent results gives me peace of mind during my projects.

Lastly, I cannot overlook the ease of storage that this drill bit set offers. The included index storage case allows for organized and easy access to each bit, which I find especially helpful when I’m in the middle of a project and need to switch bits frequently. The compact packaging makes it simple to store in my workshop without taking up unnecessary space. Plus, the support offered by the manufacturer in case of questions demonstrates a commitment to customer satisfaction that I truly appreciate.

To summarize, the MACXCOIP Cobalt Left Hand Drill Bit Set is a well-rounded, high-quality product that can significantly enhance your drilling experience. Whether you’re a DIY enthusiast, a professional tradesperson, or just someone who likes to be prepared for any task, this drill bit set is worth considering. I personally believe that investing in reliable tools pays off in the long run, and this set is an excellent choice. Don’t wait too long to add these bits to your arsenal; they may just be the solution you didn’t know you needed!

Feature	Description
Left Hand Design	Includes 13 drill bits ranging from 1/16″ to 1/4″, ideal for removing broken screws.
M35 Cobalt Drill Bit	Durable, sharp drill bits for a variety of materials including stainless steel, iron, and wood.
Quick and Efficient	135-degree tip and twist design for faster cutting and self-centering.
HSS Drill Bit Set	Excellent cutting performance with hardened and polished inserts for precision.
Easy Storage	Includes a compact case with size indexes for organized storage.

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3. Cobalt Left Hand Drill Bit Set (1/16″-1/4″) 13PCS, M35 High Speed Steel Jobber Length Drill Bit Kit for Removing Broken Stubs, Bolts and Screws, Reverse Twist Drill Bits

As someone who often finds myself tackling home improvement projects and repairs, I can confidently say that the Cobalt Left Hand Drill Bit Set (1/16″-1/4″) is a remarkable addition to any toolbox. This 13-piece set, crafted from M35 high-speed steel, stands out for its exceptional durability and extended lifespan. The quality of the materials used in this product speaks volumes, ensuring that it can withstand the rigors of even the toughest jobs. If you’re serious about your DIY projects or professional work, this drill bit set is definitely worth considering.

One of the features I find particularly impressive is the innovative design of the drill bits. The compact stubby bits allow for easy access to tight and hard-to-reach spaces, which is an absolute game-changer when you’re working in confined areas. The 135° split-point tip with multi-blades is engineered for precise self-centering and efficient drilling, which means I can focus more on the project at hand rather than worrying about alignment or slipping. This design not only enhances accuracy but also significantly reduces the likelihood of damaging the surrounding material.

The versatility of this drill bit set is another reason I’m a fan. It excels at drilling through stainless steel and other tough metals like cast iron, titanium, bronze, and aluminum. This means that whether I’m removing damaged studs, bolts, or screws, or simply creating pilot holes for new installations, I can rely on this set to get the job done efficiently. The range of sizes included—from 1/16 inch to 1/4 inch—covers most common needs, making it an invaluable resource for both professionals and DIY enthusiasts alike.

Moreover, the convenient packaging of the Cobalt Left Hand Drill Bit Set truly enhances the user experience. The sturdy plastic storage box keeps everything organized, and the clearly marked sizes make it effortless to identify the right bit for any task. I appreciate how such small details can save me time and frustration when I’m in the middle of a project. Having everything neatly stored not only prolongs the life of the bits but also ensures that I’m always ready for any drilling challenge that comes my way.

if you’re looking for a reliable, durable, and versatile drill bit set, the Cobalt Left Hand Drill Bit Set (1/16″-1/4″) is an excellent choice. Its premium quality and thoughtful design make it a tool that I believe will serve you well for years to come. Don’t miss out on the opportunity to enhance your toolkit with a product that truly stands out in performance and usability. Invest in this set today; you won’t regret it!

Feature	Details
Material	M35 High Speed Steel
Bit Sizes 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 inch
Design	135° split-point tip with multi-blades
Applications	Drilling stainless steel, tough metals; removing damaged studs, bolts, screws
Storage	Sturdy plastic box with marked sizes

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4. Cobalt Left Hand Drill Bit Set, 13Pcs High-Speed Steel Drills with Titanium Nitride Coating, Reverse Drill Bits for Hardened Metal, Stainless Steel, Cast Iron, with Index Storage Case (1/16”-1/4”)

As someone who frequently engages in DIY projects and home repairs, I can confidently say that the Cobalt Left Hand Drill Bit Set is an outstanding addition to any tool collection. This 13-piece set of high-speed steel drill bits is specifically designed to tackle the toughest materials, making it a reliable choice for professionals and hobbyists alike. The inclusion of titanium nitride coating not only enhances the durability of the bits but also significantly reduces friction during use. This feature is particularly beneficial when working with hardened metals, stainless steel, and cast iron, as it allows for smoother drilling and less wear on the tools.

One of the standout features of this drill bit set is the 135-degree double-edged design. The precision-engineered cutting edge ensures that the bits maintain their sharpness and allow for accurate hole placement. I’ve often struggled with runout when using standard drill bits, but these cobalt bits are designed to prevent that issue, providing a more controlled and efficient drilling experience. Whether you’re fixing something around the house or working on a more complex project, the precision offered by these bits is invaluable.

Another noteworthy aspect of this set is its left-handed design. This unique feature means that these drill bits can be used effectively with a screw extractor, allowing me to remove damaged screws with ease. If you’re like me and have encountered stubborn screws that refuse to budge, having a tool that can tackle that problem is a game-changer. The versatility offered by this left-handed design adds significant value to the set, making it more than just a standard drill bit collection.

The comprehensive size range is also impressive, covering everything from 1/16” to 1/4”. This means that I have the right bit for almost any job I might encounter. The variety of sizes ensures that I’m not left scrambling for the correct bit when a project calls for a specific size. It’s reassuring to know that I can rely on this set to meet all my drilling needs, whether I’m working on delicate tasks or heavy-duty applications.

Finally, the ease of storage cannot be overlooked. The included tin box with a size index is incredibly helpful for organization. I’ve often found myself frustrated with tangled or misplaced bits, but this thoughtful design keeps everything neatly in place. This feature not only saves time but also prolongs the life of the bits by preventing damage during storage.

To summarize, the Cobalt Left Hand Drill Bit Set is an exceptional choice for anyone looking to invest in high-quality, durable drill bits. With their high-speed steel construction, titanium nitride coating, precise design, and left-handed functionality, these bits are engineered to perform under pressure. The comprehensive size range and practical storage solution further enhance their value. I genuinely believe that adding this set to your toolkit will elevate your drilling experience, making tasks more manageable and efficient. If you’re in the market for reliable drill bits that won’t let you down, I highly recommend giving this set a try. You won’t regret it!

Feature	Description
Cobalt High-Speed Steel	High hardness properties for easy penetration of hard materials.
Titanium Nitride Coating	Reduces friction and lowers bit temperature during operation.
135-Degree Double-Edged Design	Prevents runout and allows for precise hole placement.
Left-Handed Design	Can be used with screw extractors to remove damaged screws.
Comprehensive Size Range	Includes 13 bits from 1/16” to 1/4”.
Easy Storage	Comes with a tin box and size index for organization.

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Why Cobalt Left Hand Drill Bits Are Essential for My DIY Projects

As someone who enjoys tackling DIY projects, I’ve learned the hard way that having the right tools can make all the difference. One of the standout tools in my collection is the cobalt left hand drill bit. These bits are not just any ordinary drill bits; they have unique features that cater specifically to my needs and enhance my efficiency.

One of the primary reasons I rely on cobalt left hand drill bits is their durability. Made from a cobalt alloy, these bits can withstand higher temperatures and resist wear and tear better than standard steel bits. This means I can drill through tough materials like stainless steel without worrying about dulling my tools quickly. In my experience, using cobalt bits has saved me both time and money since I don’t need to replace them as often.

Additionally, the left-hand twist design of these bits comes in handy when I encounter broken screws. Instead of struggling to remove a stubborn screw with traditional methods, I can use a left hand drill bit to effectively extract it. The reverse motion often grips the screw and helps pull it out effortlessly. This feature has been a game-changer for me, turning what could have been a frustrating setback into a simple fix.

cobalt

Buying Guide for Cobalt Left Hand Drill Bits

Understanding Cobalt Left Hand Drill Bits

When I first started working with different materials, I quickly learned that drill bits come in various types. Cobalt left hand drill bits are specifically designed for drilling into hard metals like stainless steel and cast iron. Their unique left-handed design is crucial for removing broken screws or bolts. This feature allows the drill bit to grab onto the broken piece as it spins in reverse, making extraction much easier.

Material Matters

One of the first things I considered when choosing cobalt left hand drill bits was the material. Cobalt steel is known for its durability and heat resistance. It can withstand higher temperatures than standard steel, which is essential for prolonged use on tougher materials. I found that this material helps maintain the sharpness of the bit longer, reducing the frequency of replacements.

Size Selection

Choosing the right size is crucial for any drilling task. I recommend having a variety of sizes in my toolkit because different projects often require different drill bit dimensions. Cobalt left hand drill bits typically come in standard sizes, so I make sure to check the size chart to find the right fit for my needs. It’s important to have both larger and smaller bits to accommodate various tasks.

Coating and Finish

The coating on cobalt left hand drill bits can significantly affect their performance. I always look for bits with a smooth finish, as this reduces friction and allows for smoother drilling. Some bits also come with additional coatings, such as titanium, which can enhance their durability and performance. Understanding the coatings can help me choose the best option for my specific applications.

Drilling Speed and RPM

In my experience, drilling speed is a key factor when using cobalt left hand drill bits. These bits can handle higher RPMs, but I’ve learned that it’s essential to adjust my speed based on the material I’m working with. Slower speeds are often better for harder materials, preventing overheating and prolonging the life of the bit. I always refer to guidelines on recommended speeds to get the best results.

Brand Reputation and Reviews

Before making a purchase, I often research the brand’s reputation. I find it helpful to read customer reviews and testimonials to gauge the reliability and performance of the cobalt left hand drill bits. A well-reviewed brand gives me confidence that I’m investing in a quality product that will meet my needs.

Price Considerations

Price can vary significantly among cobalt left hand drill bits. While I’m always looking for a good deal, I’ve learned that cheaper options may not always provide the best value. Investing in high-quality bits usually pays off in the long run, as they tend to last longer and perform better. I keep an eye out for sales but prioritize quality over price.

Storage and Organization

Finally, I consider how I will store my cobalt left hand drill bits. Having a proper storage solution helps keep my workspace organized and my bits protected. I’ve found that a dedicated drill bit case or rack is a great way to prevent damage and ensure easy access when I need them.

Final Thoughts

Buying cobalt left hand drill bits can be a straightforward process if I keep these factors in mind. By understanding the material, selecting the right sizes, considering coatings, and evaluating brand reputation, I can make informed choices that enhance my drilling projects. With the right tools in my arsenal, I feel confident tackling even the most challenging tasks.

Author Profile

Mike Nielsen

Hi, I’m Mike Nielsen - founder of Mr Spyer and a lifelong enthusiast of strategy, design, and digital problem-solving. Over the years, I’ve worn many hats in the tech space. The name “Mr. Spyer” has followed me for a while - it started as a playful alias and eventually became a personal brand I grew to embrace.

In 2025, I decided to pivot. Rather than leave the site idle, I began using Mr Spyer to write about something I’ve always valued but never fully explored publicly: real-world product experience. Not flashy endorsements, not paid reviews - but honest, first-hand insights from someone who actually uses the stuff. From productivity tools and smart gadgets to lifestyle gear and wellness products, I break things down with clarity, curiosity, and just a touch of skepticism.

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