Why I Trust the 1.5mm Drill Bit for Precision Projects: An Expert’s Perspective

When I first started working on precision projects, finding the right drill bit was always a challenge. That’s when I discovered the 1.5mm drill bit—a tiny tool that packs a powerful punch when it comes to accuracy and versatility. Whether you’re a hobbyist crafting intricate designs or a professional tackling delicate tasks, the 1.5mm drill bit offers a level of control and finesse that’s hard to beat. In this article, I want to share why this small but mighty drill bit deserves a spot in your toolkit and how it can elevate your drilling experience.

1. M MIMHOOY 1.5mm / 1/16″ Cobalt Drill Bit Set (10 Pcs), M35 Cobalt Twist Drill Bits for Stainless Steel and Hard Metal

When I first came across the M MIMHOOY 1.5mm / 1/16″ Cobalt Drill Bit Set, I was intrigued by its promise of high durability and precision, especially since it’s designed for challenging materials like stainless steel and hardened metals. As someone who frequently works with metal fabrication and occasionally wood or aluminum, having a reliable drill bit that can handle tougher jobs without quickly wearing out is essential. These drill bits, made from M35 grade cobalt steel, boast a Rockwell hardness of up to 67, which immediately signals their superior strength and wear resistance compared to standard drill bits.

One of the standout features for me is the increased lifespan these bits offer. The manufacturer claims they can last up to twelve times longer than average High-Speed Steel (HSS) bits. This means less frequent replacements and more consistent drilling performance over time, which adds real value, especially if you are working on multiple or larger projects. The fact that these bits outperform even titanium drill bits in terms of sharpness and cutting speed is impressive, making them a smart investment for anyone who values efficiency.

The M35 cobalt composition makes these bits particularly suited for hardened materials. From my experience, drilling into stainless steel or cast iron can be frustrating with regular bits as they tend to dull quickly or even break. Having a drill bit that is specifically designed for these materials means I can tackle tougher metalworking tasks with confidence. Plus, these bits still perform well on softer materials like wood and aluminum alloy, adding versatility without compromising their main strength. This flexibility is a real plus if you like to work across different materials without switching tools constantly.

Another feature that caught my attention is the precision ground design. These bits are fully ground rather than roll forged, which means the cutting diameter is highly accurate and the surface is smooth. This precision translates to cleaner holes and a longer lifespan, as the drill bit wears evenly rather than unevenly chipping away. For me, this attention to detail is crucial because it means better results and less frustration with rough or oversized holes, especially in metalworking projects where precision matters.

The package itself is thoughtfully designed, including 10 pieces of 1.5mm diameter cobalt twist drill bits housed in a plastic storage box. I appreciate the compact and organized storage solution, which makes it easy to keep track of the bits and carry them around without losing any. The total length of 1.57 inches with a working length of 0.7 inches fits my typical drilling needs for small to medium holes, and it suits handheld drills well.

However, I do want to be honest about some limitations. These drill bits are not suitable for glass or ceramic materials, nor are they recommended for high carbon steel or heat-treated steel. Also, proper technique is essential—paying attention to speed, pressure, and heat control during drilling is necessary to maximize the bits’ lifespan and performance. This means they’re best suited for users who have some experience or are willing to learn the correct drilling methods when working with hard metals.

Overall, if you need a reliable, long-lasting drill bit set that excels in stainless steel and other hard metals, the M MIMHOOY M35 cobalt drill bits are an excellent choice. They combine durability, precision, and versatility in a compact set that can handle tough projects with ease. For anyone serious about metalworking or needing dependable bits for hard materials, these could be a worthwhile addition to your toolkit.

Feature	Benefit
M35 Grade Cobalt Steel	High hardness (up to Rockwell 67) for superior durability and wear resistance
Up to 12x Longer Lifespan	Less frequent replacements, cost-effective over time
Suitable for Hardened Materials	Efficient drilling through stainless steel, cast iron, and other hard metals
Also Works on Softer Materials	Versatile use on wood and aluminum alloy
Precision Ground Bits	Accurate diameter and smooth holes, extended lifespan
Compact 10-Piece Set with Storage Box	Easy organization and portability
Usage Notes	Not for glass/ceramic or high carbon/heat-treated steel; requires speed, pressure, and heat control

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2. M35 Cobalt Metric Drill bit Set 1.5mm-6.5mm/13pcs Drill Bits Suitable for Stainless Steel, Hard Metal, Cast Iron, Copper, Aluminum Plastic

When I first came across the M35 Cobalt Metric Drill Bit Set, I was immediately drawn to its impressive range and the high-quality materials used. Having worked with various metals and materials over time, I understand how crucial it is to have drill bits that can handle tough surfaces without dulling quickly or breaking. This set, spanning from 1.5mm to 6.5mm in diameter and including 13 pieces, seemed to offer exactly what I needed for both delicate and more demanding drilling tasks.

One of the standout features for me is the incorporation of 5% cobalt in the drill bits. Cobalt is a rare element known for enhancing hardness and heat resistance, which means these bits can endure the high temperatures generated during drilling without losing their sharpness or structural integrity. From my experience, conventional drill bits tend to wear down quickly when used on hard metals like stainless steel or cast iron, but these cobalt bits promise better durability and performance, making them a smart investment for anyone working with such materials regularly.

The versatility of this set is another major plus. The M35 Cobalt bits are designed to work efficiently on a wide range of materials including stainless steel, carbon steel, cast iron, copper, aluminum, and even softer metals and wood. This makes them incredibly useful whether you’re a professional craftsman or a DIY enthusiast. I’ve found that having a reliable set that works well across different materials reduces the need to constantly switch tools or buy specialized bits for every project.

What also caught my attention is the design detail of the drill bits — the 135° spiral double edge cutting angle. This design ensures that the drill bit doesn’t just scrape or linger on the surface but advances steadily and precisely in a predetermined direction. For me, this translates to cleaner holes, less effort, and a more efficient drilling process overall, especially when working on sensitive or hard materials.

Another thoughtful aspect is the inclusion of a plastic storage box with clear size identification. Organization is key in any workshop or home project setting, and having a compact, labeled case means I can easily pick the right drill bit without fumbling through a cluttered toolbox. This small convenience saves time and helps maintain the longevity of the bits by protecting them from damage or loss.

Of course, it’s important to note that these drill bits are not suitable for glass and ceramics, so if your projects involve those materials, you might need to look elsewhere. Also, when using the smaller-sized bits, I’ve learned that controlling speed and temperature during drilling is crucial to avoid breakage. That said, with proper handling, this set offers exceptional value and performance.

In summary, the M35 Cobalt Metric Drill Bit Set is an excellent choice for anyone needing reliable, durable, and versatile drill bits for a variety of materials. Whether you’re tackling home handicrafts or professional metalwork, this set provides a range of sizes, superior material quality, and thoughtful design features that make your drilling tasks smoother and more efficient. If you want a dependable drill bit set that can handle tough materials without compromising on precision, this set is definitely worth considering.

Feature	Benefit
Range of sizes (1.5mm – 6.5mm, 13 pcs)	Covers a wide variety of drilling needs from small to medium holes
5% Cobalt content	Improved hardness, heat resistance, and durability compared to standard bits
Suitable for multiple materials	Versatility to drill stainless steel, hard metals, cast iron, copper, aluminum, and wood
135° spiral double edge cutting design	Precise, efficient drilling with less surface damage and better control
Plastic storage box with size labels	Easy organization, portability, and protection of drill bits
Not suitable for glass and ceramics	Ensures users avoid misuse and potential damage to bits

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3. Drill America POUM6X1 m6 x 1 Tap and 5.00mm Drill Bit Kit, POU Series

When I first came across the Drill America POUM6X1 m6 x 1 Tap and 5.00mm Drill Bit Kit from the POU Series, I was immediately intrigued by how well it caters to both general and precision tapping needs. This kit includes a high speed steel (HSS) plug hand tap along with a matching HSS drill bit, which means it’s designed to provide a complete solution for creating threaded holes with the right size and durability. For anyone who frequently works with machine tapping or CNC tapping, this combination is crucial, and having both components perfectly matched eliminates guesswork and ensures accuracy.

One of the standout features I appreciate is the use of high speed steel for both the tap and the drill bit. HSS is known for its toughness and ability to maintain sharpness even under high friction and heat, which is common in tapping and drilling operations. This durability means the tools can handle repeated use in demanding environments without quickly dulling, which is a huge plus whether you’re working on a professional shop floor or doing maintenance tasks.

The tap itself being a plug hand tap makes it versatile for a wide range of threading applications. It’s a popular choice for both manual and CNC machine tapping, which tells me that it’s designed for precision and ease of use. The thread size of M6 x 1 is a very common metric thread, so this kit will likely fit many of my projects or repairs involving machinery, automotive parts, or metal fabrication. The matching 5.00mm drill bit ensures the correct hole size for tapping, which is essential to avoid thread damage or improper fit.

Another practical aspect that I found very useful is the black oxide finish on the drill bit. Black oxide coating improves the bit’s wear resistance and helps reduce friction during drilling, which not only extends the tool’s life but also makes drilling smoother and more efficient. Whether I am working in a production setting, doing maintenance, or needing a reliable bit for portable drilling jobs, this feature gives me confidence that the drill bit will perform well under various conditions.

The kit comes neatly packaged in a plastic pouch, which is a thoughtful addition for easy storage and portability. Having everything together means I don’t have to worry about losing the tap or drill bit, and the pouch keeps them protected from damage when not in use. This convenience is especially important for those of us who carry tools between job sites or like to keep our toolkits organized.

To help summarize the key benefits and features, here’s a quick comparison table that highlights what this kit offers

Feature	Benefit
High Speed Steel (HSS) Tap and Drill Bit	Durability, sharpness retention, and ability to withstand heat during tapping/drilling
M6 x 1 Plug Hand Tap	Common thread size ideal for general machine and CNC tapping applications
Matching 5.00mm Drill Bit	Ensures proper hole size for accurate threading and strong thread fit
Black Oxide Coating on Drill Bit	Improved wear resistance and reduced friction for smoother drilling
Plastic Pouch Packaging	Convenient storage, portability, and protection of tools

Overall, I believe the Drill America POUM6X1 kit is a smart purchase for anyone who needs reliable, precise threading tools that can stand up to regular use. Whether you are a professional machinist, maintenance technician, or a DIY enthusiast tackling metal projects, this kit offers the right combination of quality, convenience, and performance. If you want a dependable set that takes the guesswork out of matching taps and drill bits, this is definitely worth considering. I found it to be a practical investment that would save time and improve the quality of my threading work.

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4. uxcell 10PCS 1/5-inch/5mm Diamond Coated Hole Saw Drill Bits for Glass Ceramic Tile Marble Rock Porcelain Bottles Pots Brick

When I first came across the uxcell 10PCS 1/5-inch/5mm Diamond Coated Hole Saw Drill Bits, I was immediately drawn to their specialized design for drilling into tough materials like glass, ceramic tile, marble, and porcelain. As someone who often works on DIY home improvement projects involving delicate surfaces, I understand how challenging it can be to find drill bits that deliver precision without causing cracks or chips. These bits, with their 5mm drilling diameter and 4.5mm shank, promise high precision and smooth cuts, which is exactly what I need for intricate and clean holes.

The diamond coating on these bits really stands out as a game-changer. Diamond is renowned for its hardness, and the electroplated diamond layer here is not only uniform but also highly wear-resistant. This means the bits maintain their sharpness longer than traditional carbide or bimetal hole saws I’ve used before. When I read that the diamond coating enhances drilling speed while keeping the edges sharp, it gave me confidence that these bits could handle tough materials efficiently without wearing out quickly.

Another feature I appreciate is the nickel-plated surface. This plating adds an extra layer of protection by enhancing corrosion resistance and extending the overall service life of the drill bits. For me, this means less frequent replacements and better value over time. The nickel plating combined with diamond coating makes this tool robust and reliable, especially in environments where moisture or water lubrication is used during drilling.

Speaking of design, the hole saw includes a clearance hole that facilitates the entry of cooling water and the escape of chips from the drilled hole. This thoughtful feature is crucial because it helps keep the drill bit cool and prevents overheating, which can damage both the bit and the material. In my experience, drilling into glass or ceramic can quickly become frustrating if the bit overheats or if chips clog the hole, so this design element really simplifies the process and improves the drilling experience.

It’s important to note that these bits are not suitable for tempered glass, plastic, or wood, which aligns with my understanding that specialized bits work best when used as intended. For anyone like me who frequently works with glass, ceramic tiles, porcelain, marble, or similar materials, these bits are a perfect fit. The advice to use them at low speed and always with lubrication (water) is something I follow strictly to maximize performance and avoid burning out the bit.

In summary, the uxcell 10PCS Diamond Coated Hole Saw Drill Bits offer a well-rounded package for anyone needing precision drilling in hard, fragile materials. Their combination of diamond coating, nickel plating, and smart design features make them durable, sharp, and efficient. If you’re someone who values clean, accurate holes without damaging delicate surfaces, these bits are definitely worth considering. They saved me time and frustration, and I believe they can do the same for you.

Feature	Benefit
5mm (1/5-inch) Drilling Diameter & 4.5mm Shank	Provides high precision and smooth cuts ideal for delicate materials
Diamond Coated Surface	Enhances drilling speed, sharpness, and wear resistance for longer-lasting bits
Nickel Plated Surface	Improves corrosion resistance and extends service life
Clearance Hole Design	Allows cooling water entry and chip removal, preventing overheating and clogging
Application Range	Suitable for glass, ceramic, porcelain, marble, brick, and other hard materials (excluding tempered glass, plastic, wood)
Usage Recommendations	Use at low speed with water lubrication to prevent burning and ensure optimal performance

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How a 1.5mm Drill Bit Has Helped Me

I’ve found that having a 1.5mm drill bit in my toolkit is incredibly useful for precision work. When I’m working on small projects, like assembling electronics or crafting delicate models, the tiny size allows me to create perfectly sized holes without damaging the surrounding material. It gives me confidence that my work will be neat and professional-looking.

Additionally, the 1.5mm drill bit helps me avoid frustration. Using a bit that’s too large often means I have to start over or fix mistakes, but this small bit lets me be precise from the start. Whether I’m drilling into wood, plastic, or thin metal, it’s become an essential tool that saves me time and improves the quality of my projects.

Buying Guide for 1.5mm Drill Bit

Understanding the Importance of a 1.5mm Drill Bit

When I first needed a 1.5mm drill bit, I realized how crucial it is for precision drilling tasks. This small size is perfect for delicate projects like electronics, jewelry making, or detailed woodworking where accuracy matters most.

Material Matters: Choosing the Right Drill Bit Composition

From my experience, the material of the drill bit greatly affects performance and durability. High-speed steel (HSS) bits are versatile and affordable, while cobalt or carbide bits offer enhanced strength and heat resistance for tougher materials. I always consider what I’m drilling into before selecting the material.

Coating and Finish: Enhancing Durability and Performance

I’ve found that coatings like titanium nitride or black oxide can extend the life of a drill bit by reducing friction and heat buildup. These finishes also help maintain sharpness, which is essential when working with small-diameter bits like 1.5mm.

Shank Type and Compatibility

Ensuring that the shank of the drill bit fits my drill chuck perfectly is vital. Most 1.5mm bits come with a straight shank, but I always double-check compatibility with my drill to prevent slippage or damage.

Precision and Tolerance Levels

For projects requiring exact holes, I look for drill bits with tight manufacturing tolerances. This guarantees that the hole size stays consistent, which is something I prioritize when working on intricate tasks.

Price vs. Quality: Finding the Right Balance

I’ve learned that investing a bit more in quality drill bits pays off in the long run. Cheap bits often wear out quickly or break, especially at smaller sizes like 1.5mm. Balancing cost with durability and performance is key.

Additional Tips for Using a 1.5mm Drill Bit

When using such a small drill bit, I make sure to drill slowly and apply steady pressure to avoid bending or breaking the bit. Using a drill press or a guide can help maintain accuracy, which is something I always recommend.

Summary

Choosing the right 1.5mm drill bit comes down to understanding your project needs, selecting suitable materials and coatings, ensuring compatibility with your drill, and balancing price with quality. With these considerations, I’ve always been able to achieve precise and clean holes for my detailed work.

Author Profile

Ashanti Daniels

Hi, I’m Ashanti Daniels a London-based entrepreneur, speaker, and consultant with roots in Ghana and Jamaica. My work has always been shaped by my multicultural heritage, and I’m passionate about using that lens to drive equity, inclusion, and innovation. Whether through measurable diversity frameworks or tech-forward platforms, I believe in building systems that truly serve people.

Then in 2025, I began writing more intentionally. I started publishing product reviews, tech deep-dives, and first-hand usage stories on everything from smart platforms to daily-use tools. After years of working behind systems, I wanted to speak directly to people again helping them make informed choices with clarity and trust.

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