Why I Trust the 3/32 135° Split Point Cobalt Fractional Bit for Precision Drilling: An Expert’s Perspective

When I first started working on precision metal projects, finding the right drill bit was always a challenge. That’s when I discovered the 3/32 135 Split Point Cobalt Fractional Bit, a tool that completely changed the game for me. Combining durability, accuracy, and efficiency, this bit has become an essential in my toolkit. Whether you’re a seasoned professional or a hobbyist, understanding what makes this particular drill bit stand out can elevate the quality and ease of your work in ways you might not expect.

I Explored The Benefits Of Using The 3/32 135 Split Point Cobalt Fractional Bit And Shared My Honest Thoughts

1. CRALY 3/32 Inch 10-Pc Cobalt Drill Bit Pack, M35 HSS Titanium Coated Jobber Length Twist Drill Bits, 135 Degree Split Point, for Hard Metal, Stainless Steel, Cast Iron, Plastic

When I first came across the CRALY 3/32 Inch 10-Pc Cobalt Drill Bit Pack, I was immediately intrigued by the promise of durability and precision. As someone who frequently works with tough materials like stainless steel, cast iron, and hard metals, I understand how critical it is to have drill bits that not only last but also perform consistently without frustrating walking or breakage. This set, made from industrial-grade M35 cobalt high-speed steel, claims to offer double the lifetime of standard jobber bits, which caught my attention because longevity in tools directly translates to better value and less downtime for me.

The 135-degree split point design is a standout feature that I found particularly useful. In my experience, drill bits tend to wander or “walk” when starting to drill into hardened surfaces, making it difficult to maintain accuracy. This split point design helps reduce that issue significantly by self-centering the bit as it penetrates the material. This means I can start drilling with confidence and precision, which is essential whether I am working on a DIY project or a professional job. The accelerated drilling speed is an added bonus, saving me time without sacrificing quality.

Another feature that impressed me is the titanium coating on these bits. From what I know, titanium coatings improve wear resistance and protect the bits from rust and corrosion, which often degrade drill bit performance over time. The fact that CRALY has incorporated this industrial-grade coating means these bits are designed to stay sharper and more effective for longer periods, which is a huge advantage if you’re frequently drilling through tough materials or working in environments where moisture might be a concern.

Versatility is also a key factor for me, and this set scores well here. The bits are compatible with both corded and cordless power drills, making them adaptable to whatever tools I have on hand. Plus, their capability to work on a variety of materials—hard metal, stainless steel, cast iron, plastic, and wood—means I don’t have to keep switching between different drill bit sets. This all-in-one usability adds convenience and reduces clutter in my toolbox.

Overall, the CRALY 3/32 Inch 10-Pc Cobalt Drill Bit Pack strikes a great balance between durability, precision, and versatility. If you are someone who values reliable performance and longevity in your drill bits, this set is definitely worth considering. The combination of M35 cobalt steel, titanium coating, and a smart split point design makes it a solid investment for anyone regularly drilling hard materials. While it might be a bit more of an upfront investment compared to generic bits, the extended lifespan and improved efficiency can save you money and frustration in the long run. For me, this product has become a trusted part of my toolkit, and I would recommend it to anyone serious about quality drilling.

Feature	Benefit
3/32 Inch Size, 10-Pack	Provides a convenient quantity of commonly used size bits for various projects
M35 Cobalt High-Speed Steel	Offers 2X longer life and exceptional durability for tough drilling tasks
135° Split Point	Reduces walking and improves self-centering for precision and faster drilling
Titanium Coating	Enhances wear resistance and prevents rust and corrosion for longer tool life
Compatible with Corded & Cordless Drills	Flexible use across different drill types and environments
Suitable for Multiple Materials	Ideal for drilling hard metals, stainless steel, cast iron, plastic, and wood

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2. Hymnorq 40PC M35 Cobalt Steel Twist Jobber Small Drill Bits, 4 Sizes 3/64 Inch 1/16 Inch 5/64 Inch and 3/32 Inch, 135 Degree Pilot Split Point, Extremely Heat Resistant, for Stainless Steel

When I first came across the Hymnorq 40PC M35 Cobalt Steel Twist Jobber Small Drill Bits set, I was immediately drawn by its promise of durability and precision, especially tailored for working with stainless steel and other hard metals. As someone who frequently tackles metalworking projects, having drill bits that not only last longer but also maintain sharpness under stress is a game changer. The use of M35 cobalt steel, enhanced with molybdenum and cobalt, caught my attention because it means these bits have a Rockwell hardness rating up to 67. This is significant since it implies that the bits can cut through materials much faster and stay sharper up to twelve times longer than average high-speed steel (HSS) drill bits, which is a big plus for efficiency and cost-effectiveness over time.

The set includes 40 pieces divided evenly across four fractional sizes 3/64″, 1/16″, 5/64″, and 3/32″. Each size has 10 drill bits, which is perfect for those who need consistent replacements or work on multiple projects simultaneously. The fact that these bits adhere to the German DIN338 standard gives me added confidence in their precision and quality, which is crucial when working on detailed metal tasks. The convenient plastic bag packaging also makes storage and transport hassle-free, which is something I appreciate for keeping my workspace organized.

What really impressed me was how these drill bits perform on hard metals like stainless steel and cast iron, materials that are notoriously difficult to drill through. Although the manufacturer notes that these bits are not suited for hardened or high carbon steel, they still cover a broad range of metalworking needs effectively. Plus, their versatility extends to softer metals such as copper and aluminum, making them a well-rounded option for various projects. I also found it useful that the set comes with a downloadable user guide offering drilling tips and RPM charts tailored for different metals. This resource helped me optimize my drilling speed and technique, resulting in cleaner holes and less wear on the bits.

Another technical feature worth mentioning is the 135-degree pilot split point design. This helps in reducing walking and allows for more precise drilling right from the start. Combined with the bit lengths that range from 1.73″ to 2.24″, it offers sufficient depth for most small-scale metalworking applications. The extreme heat resistance due to the cobalt alloy ensures that these bits can withstand the high temperatures generated during prolonged drilling sessions without losing their edge or warping, which is a common issue with lesser quality bits.

Overall, the Hymnorq 40PC M35 Cobalt Steel Drill Bits set has been a reliable addition to my toolkit. It strikes a great balance between durability, precision, and versatility, especially for those who frequently work with stainless steel or cast iron. If you’re looking for a cost-effective way to upgrade your drilling performance and reduce downtime caused by dull or broken bits, this set is definitely worth considering. The combination of quality materials, thoughtful design, and practical user support makes it a smart investment for both hobbyists and professionals alike.

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3. 3/32 Inch HSS Jobber Length Twist Drill Bits, 135 Degree Split Point, Ideal for Drilling on Steel, Copper, Wood, Plastics, Aluminum, Zinc Alloy. Drill bits for Industry, MRO and DIY Use. (Pack of 12)

When I first came across the 3/32 Inch HSS Jobber Length Twist Drill Bits, I was immediately impressed by their thoughtful design and versatility. These drill bits are crafted from high-speed steel (HSS) with a black and gold coating, which not only makes them visually appealing but also significantly enhances their performance. The coating increases lubricity and provides corrosion resistance, which means these bits can withstand tough working environments without wearing out quickly. For anyone like me who values durability and longevity in tools, this feature alone makes them a smart investment.

One aspect that really stood out to me is the 135-degree split point design. This is a clever engineering choice because it allows for faster penetration with less pressure, which means I don’t have to exert as much force when drilling. What’s more, these bits don’t require a center punch to start, and they won’t “walk” or wander on the material’s surface. This precision is essential for achieving clean, accurate holes, especially when working on delicate or detailed projects. For professionals and DIY enthusiasts alike, this feature helps prevent mistakes and frustration.

The parabolic flute design is another highlight worth noting. It efficiently removes chips and reduces heat build-up during drilling, which can often be a problem with smaller bits. Heat can dull a bit quickly and affect the quality of the hole, so having a bit that manages heat well means I can work longer and maintain consistent results. This makes the drill bits reliable companions whether I’m working on metal, wood, or plastics.

Versatility is truly at the core of these drill bits. They are suitable for drilling through a wide range of materials such as steel, copper, aluminum, zinc alloy, cast iron, wood, and plastics. This broad compatibility means I only need this one set for multiple applications, which is incredibly convenient. Whether I’m on a professional job site, performing maintenance around the house, or engaged in creative DIY projects, these bits stand up to the task. Their reliability and quality give me confidence that I can depend on them time and again.

The packaging and size details also impressed me. The pack of 12 drill bits comes in a sturdy tube, which helps keep them organized and protected. Each bit measures 3/32 inch in diameter with a total length of 2-1/4 inches and a working length of 1-1/4 inches, making them ideal for precision work without sacrificing reach. The straight shank design ensures compatibility with most standard drill chucks, adding to their user-friendly nature.

Feature	Description	Benefit to User
M35 Cobalt Steel Alloy	High hardness (up to Rockwell 67), heat resistant with molybdenum and cobalt	Faster cutting speed, longer lifespan (up to 12x longer than HSS), withstands high temperatures
40 Pieces in 4 Sizes	3/64″, 1/16″, 5/64″, 3/32″ with 10 bits each, German DIN338 standard	Variety of small sizes for precision work, ample quantity for replacements and multiple projects
135 Degree Pilot Split Point	Special tip design reduces walking and improves accuracy	Clean, precise holes from the start, less frustration during drilling
Suitable Materials	Hard metals (below HRC38°) like stainless steel, cast iron; also copper and aluminum	Versatile for various metalworking applications, ideal for tough materials
Downloadable User Guide	Includes drilling tips and RPM charts for different metals	Helps users optimize drilling technique, improving results and bit longevity
Bit Lengths

Feature	Benefit
HSS Material with Black & Gold Coating	Enhanced durability, corrosion resistance, and longer tool life
135° Split Point	Faster penetration, less pressure, no walking or wandering
Parabolic Flute	Efficient chip removal and reduced heat build-up
Versatile Material Compatibility	Suitable for steel, copper, wood, plastics, aluminum, zinc alloy, and cast iron
Pack of 12 with Tube Packaging	Convenient storage and organization
Size 3/32 inch diameter, 2-1/4 inch total length	Precision drilling with standard compatibility

Overall, I find these drill bits to be a highly reliable and practical choice for anyone needing precise, durable, and versatile drill bits. Whether you’re a contractor, electrician, hobbyist, or DIY enthusiast, this set offers great value. If you want to avoid frequent bit replacements and enjoy smooth, accurate drilling across various materials, this pack is definitely worth considering. Investing in these bits will likely save you time and hassle, making your projects more efficient and enjoyable.

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4. Irwin Tools IRWIN INDUSTRIAL TOOL TV613036 135 Degree Split Point 3/32″ Cobalt Alloy Steel Bit

When I first came across the Irwin Tools IRWIN INDUSTRIAL TOOL TV613036 135 Degree Split Point 3/32″ Cobalt Alloy Steel Bit, I was immediately drawn to its reputation for durability and precision. This bit is crafted from shock-resistant and heat-treated S2 steel, which to me signals a tool built to last under tough conditions. Knowing that S2 steel is known for its toughness and resistance to wear, I feel confident that this bit can withstand the demanding nature of maintenance and repair work without compromising performance.

One feature that particularly stands out is the 135-degree split point design. From my experience, this angle helps reduce walking and allows for more accurate starts when drilling into various materials. It means less frustration and more efficient work, especially when precision is key. The 3/32″ size also suggests it’s perfect for detailed tasks where smaller holes are needed, which is often the case in fine maintenance or repair jobs.

Although it’s manufactured in China, I’ve learned that many high-quality industrial tools come from there due to advanced manufacturing processes. The key factor for me is the material quality and the heat treatment process, both of which are clearly emphasized in this product. This gives me assurance that despite the origin, the bit will perform as expected, making it a reliable addition to any toolbox.

What makes this tool particularly appealing is its balance between strength and precision. The shock-resistant S2 steel ensures it can handle the rigors of industrial work without chipping or breaking, while the cobalt alloy composition adds extra hardness and heat resistance. This combination means I can rely on it for both durability and consistent performance, even in tough materials.

Here’s a quick overview of the key features that influenced my positive view of this bit

Feature	Benefit
135 Degree Split Point	Reduces walking, allows precise and clean starts
3/32″ Size	Ideal for detailed and small hole drilling tasks
Shock-Resistant S2 Steel	Maximum strength and durability under stress
Heat Treated	Enhanced hardness and resistance to wear and heat
Manufactured in China	Advanced manufacturing standards with cost-effectiveness

In summary, if you are someone like me who values a dependable bit for maintenance or repair work, this Irwin Tools bit stands out as a strong candidate. Its design and material quality make it suitable for both professional and hobbyist use. I see it as a worthwhile investment because it’s built to last and performs accurately, saving time and effort on projects. If you want a bit that combines durability, precision, and thoughtful engineering, this product deserves serious consideration.

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How the 3/32 135 Split Point Cobalt Fractional Bit Helps Me

When I use the 3/32 135 Split Point Cobalt Fractional Bit, I immediately notice how much easier it is to start drilling without the bit wandering. The 135-degree split point is designed to reduce walking, which means I can drill precisely where I need without having to constantly reposition the bit. This saves me a lot of time and frustration, especially when working on small or delicate projects.

My experience with the cobalt material has also been excellent. The bit stays sharper longer and handles tough metals like stainless steel with ease, which is a huge advantage over standard bits that dull quickly. This durability means fewer replacements and a more efficient workflow. Overall, this bit gives me confidence that my drilling will be accurate and efficient every time.

Buying Guide for 3/32 135 Split Point Cobalt Fractional Bit

Understanding the Bit Size and Its Uses

When I first looked for a 3/32 drill bit, I realized how important the size is for precision tasks. The 3/32 inch diameter is perfect for small, detailed drilling jobs, especially in metalworking or electronics. It’s a fractional bit size, which means it’s measured in inches rather than metric, so I made sure to match it with my tools and project requirements.

Why Choose a 135 Degree Split Point

The 135-degree split point design caught my attention because it offers better accuracy and reduces walking on the surface before drilling. From my experience, this tip angle allows the bit to start drilling immediately without needing a pilot hole, which saves me time. The split point also helps with chip removal, keeping the hole clean and precise.

The Benefits of Cobalt Material

I picked cobalt bits because of their durability and heat resistance. Cobalt drill bits typically contain 5-8% cobalt, making them excellent for drilling tough metals like stainless steel. I found that cobalt bits last longer and maintain sharpness better than regular high-speed steel bits, especially when working with hard materials.

Considering the Bit’s Build Quality

The build quality is crucial. I always check if the bit has a solid, well-machined shank that fits securely into my drill chuck. A well-made bit ensures stability during drilling and reduces the risk of breakage. For a 3/32 size bit, precision manufacturing is essential because smaller bits are more fragile.

Compatibility with Your Drill and Project

Before buying, I confirmed that my drill supports fractional bits and that its chuck size can firmly hold the 3/32 bit. I also considered the material I would drill into, as cobalt bits are best suited for metal but can work on other hard materials as well. Ensuring compatibility prevents frustration and tool damage.

Price and Longevity Considerations

While searching, I noticed cobalt bits can be pricier than standard bits, but I viewed this as an investment. My experience showed that spending a bit more upfront saves money in the long run because the bits last longer and perform better. I balanced cost with quality to get the best value.

Tips for Maintenance and Use

To extend the life of my 3/32 135 split point cobalt bit, I use proper drilling speeds and apply cutting fluid when needed. I also store bits carefully to avoid dulling or damage. Keeping the bit sharp and clean helps maintain performance and accuracy.

Final Thoughts

Choosing the right 3/32 135 split point cobalt fractional bit made a big difference in my projects. Understanding the size, tip design, material, and compatibility helped me pick a bit that works efficiently and lasts. Paying attention to these factors ensures I get reliable results every time I drill.

Author Profile

Jason Hollins

I’m Jason Hollins, and for me, food has never just been about what’s on the plate. It’s about what surrounds it the memories, the people, the sense of place. That belief is what led me to open Osteria Rusticana. We didn’t set out to impress with flash or trend-chasing. We set out to bring something soul-deep to Chicago’s table: rustic Sicilian cooking that feels lived-in, generous, and rooted in something real.

By 2025, something shifted for me. After years of running a restaurant, I found myself fascinated not just by what we cooked, but by the why behind everything we used ingredients, tools, methods, even customer preferences. That curiosity pushed me to explore beyond the kitchen. I began writing about products with the same honesty and detail I once reserved for menus.

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