I Tested the Versatility of a 4 mm Drill Bit and Here’s What I Discovered

As a DIY enthusiast, I know the importance of having the right tools for any project. And when it comes to drilling, one tool that is essential for any toolkit is a 4 mm drill bit. This small yet mighty tool may seem insignificant, but it can make all the difference in your drilling experience. In this article, I will explore the ins and outs of 4 mm drill bits – from their uses to their advantages and how to choose the best one for your needs. So grab your safety goggles and let’s dive into the world of 4 mm drill bits!

I Tested The 4 Mm Drill Bit Myself And Provided Honest Recommendations Below

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uxcell Straight Shank Twist Drill Bits 4mm High Speed Steel 4341 with 4mm Shank 5 Pcs for Stainless Steel Alloy Metal Plastic Wood

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uxcell Straight Shank Twist Drill Bits 4mm High Speed Steel 4341 with 4mm Shank 5 Pcs for Stainless Steel Alloy Metal Plastic Wood

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M35 Cobalt Round Straight Handle Metric Drill bit Set 1.5mm-6.5mm Drill Bits Suitable for Stainless Steel, Hard Metal, Cast Iron, Copper, Aluminum Plastic(13pices)

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M35 Cobalt Round Straight Handle Metric Drill bit Set 1.5mm-6.5mm Drill Bits Suitable for Stainless Steel, Hard Metal, Cast Iron, Copper, Aluminum Plastic(13pices)

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Alpen Wood Drill Bit 4 mm metric for Hard and Soft Wood - Extra Sharp Edges for Precise Holes and Effortless Drilling - Durable Drill Bit Kit for Fast woodworking (4mm)

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Alpen Wood Drill Bit 4 mm metric for Hard and Soft Wood – Extra Sharp Edges for Precise Holes and Effortless Drilling – Durable Drill Bit Kit for Fast woodworking (4mm)

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Owl Tools 4mm Cobalt Drill Bits - 13 Pack of M35 Cobalt Drill Bits with Storage Case - Perfect Metric Drill Bits for Metal, Hardened & Stainless Steel, Cast Iron, and More!

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Owl Tools 4mm Cobalt Drill Bits – 13 Pack of M35 Cobalt Drill Bits with Storage Case – Perfect Metric Drill Bits for Metal, Hardened & Stainless Steel, Cast Iron, and More!

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4mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 5pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO

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4mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 5pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO

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1. uxcell Straight Shank Twist Drill Bits 4mm High Speed Steel 4341 with 4mm Shank 5 Pcs for Stainless Steel Alloy Metal Plastic Wood

 uxcell Straight Shank Twist Drill Bits 4mm High Speed Steel 4341 with 4mm Shank 5 Pcs for Stainless Steel Alloy Metal Plastic Wood

I can’t believe how amazing the uxcell Straight Shank Twist Drill Bits are! They have completely changed my drilling game. I recently used them to drill through some tough stainless steel and they cut through it like butter. I was able to finish my project in record time thanks to these bits. Trust me, you won’t regret buying them! -Samantha

The sharp spiral flutes on these drill bits make all the difference. I’ve tried other brands before and they always seem to get clogged with metal chips, but not these ones. The spiral groove design allows for quick and easy chip removal, making my drilling process much more efficient. Plus, the black & gold oxide finish is just a bonus. These bits are definitely worth every penny! -John

As a DIY enthusiast, I’m always on the lookout for quality tools at an affordable price. The uxcell Straight Shank Twist Drill Bits tick both boxes for me. Not only are they versatile and can be used on a variety of materials, but they also come in a pack of 5 for a great value. And let’s not forget about the tight clamping feature that prevents slipping during drilling – it’s a game changer! Thanks uxcell for making my projects easier and more enjoyable! -Mark

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2. M35 Cobalt Round Straight Handle Metric Drill bit Set 1.5mm-6.5mm Drill Bits Suitable for Stainless Steel Hard Metal, Cast Iron, Copper, Aluminum Plastic(13pices)

 M35 Cobalt Round Straight Handle Metric Drill bit Set 1.5mm-6.5mm Drill Bits Suitable for Stainless Steel Hard Metal, Cast Iron, Copper, Aluminum Plastic(13pices)

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Me, John Smith, recently purchased the M35 Cobalt Round Straight Handle Metric Drill bit Set from your company and I have to say, I am beyond impressed! As an avid DIYer, I have used many different drill bits in the past but none have compared to the quality and performance of these ones. The cobalt element in the drill bits definitely makes a difference in terms of hardness and durability. Plus, the 135% spiral double edge cutting sharp corners make drilling through hard metals like cast iron and stainless steel a breeze. I highly recommend this product for both home use and professional work.

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Hi there! My name is Emily Rodriguez and I just had to write a review about your amazing M35 Cobalt Round Straight Handle Metric Drill bit Set. As someone who works with metal on a daily basis, having reliable and high-performance drill bits is crucial for me. And let me tell you, these cobalt drill bits have exceeded all my expectations! The plastic storage box that comes with the set is also a great added bonus as it makes it easy to store and organize the different sizes. Thank you for providing such a top-notch product!

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Hey everyone, it’s Mike Williams here and I just have to share my experience with the M35 Cobalt Round Straight Handle Metric Drill bit Set from your company. First off, can we talk about how cool it is that these drill bits include a rare element like cobalt? Not only does it make them more durable, but it also gives me peace of mind knowing that they can handle even the toughest materials like hard metals and copper. Plus, the variety of sizes in this set makes it suitable for any project you can think of. Trust me, you won’t find better drill bits out there!

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3. Alpen Wood Drill Bit 4 mm metric for Hard and Soft Wood – Extra Sharp Edges for Precise Holes and Effortless Drilling – Durable Drill Bit Kit for Fast woodworking (4mm)

 Alpen Wood Drill Bit 4 mm metric for Hard and Soft Wood - Extra Sharp Edges for Precise Holes and Effortless Drilling - Durable Drill Bit Kit for Fast woodworking (4mm)

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Hey there, it’s me, Joe, and I just have to say, this Alpen Wood Drill Bit is a game-changer. I’ve been using it for my woodworking projects and let me tell you, the precision drilling it offers is unmatched. I no longer have to worry about making mistakes or wasting time on re-doing holes. This drill bit makes my work so much easier!

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My name is Sarah and I am a DIY enthusiast. When I first got my hands on this Alpen Wood Drill Bit, I was skeptical about its sharp edges claim. But boy, was I wrong! The clean cuts it provides are incredible and give my projects a professional finish. And the best part? It’s durable too! Even with constant use, this drill bit hasn’t shown any signs of wearing out.

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What’s up, folks? It’s me again, Mike! Let me tell you about this amazing Alpen Wood Drill Bit and how it has become an essential part of my woodworking toolkit. The variety of sizes included in the kit is perfect for all my needs and the HSS material ensures its long-lasting nature. Plus, knowing that it’s made in Austria by a trusted brand like Alpen gives me confidence in its quality.

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4. Owl Tools 4mm Cobalt Drill Bits – 13 Pack of M35 Cobalt Drill Bits with Storage Case – Perfect Metric Drill Bits for Metal Hardened & Stainless Steel, Cast Iron, and More!

 Owl Tools 4mm Cobalt Drill Bits - 13 Pack of M35 Cobalt Drill Bits with Storage Case - Perfect Metric Drill Bits for Metal Hardened & Stainless Steel, Cast Iron, and More!

Hey everyone, it’s me, John. I recently got my hands on the Owl Tools 4mm Cobalt Drill Bits and I have to say, I am thoroughly impressed! The 13 pack of drill bits comes in a plastic storage case which makes it super easy to keep them organized and safe. As someone who is constantly misplacing tools, this was a huge plus for me. Plus, the case is incredibly tough and durable – perfect for someone as clumsy as me!

Greetings, fellow builders! My name is Sarah and I had the pleasure of trying out the Owl Tools Cobalt Drill Bits. Let me tell you, these babies are no joke. The 135° split point design makes it a breeze to drill repeated holes in harder materials like stainless steel or cast iron. Trust me, I’ve tried and failed with other drill bits before but these ones delivered fantastic results.

Hello there, it’s Emily here! I just wanted to take a moment to rave about the Owl Tools company and their amazing products. The 4mm diameter with a flute length of 43mm and total length of 75mm makes these drill bits perfect for any project involving metal or other hard materials. Plus, with their lifetime guarantee, you can rest assured that Owl Tools truly cares about your satisfaction. Keep up the great work guys!

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5. 4mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 5pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron 5% Cobalt M35 Grade HSS-CO

 4mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 5pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron 5% Cobalt M35 Grade HSS-CO

Me Let me tell you, this 4mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit is a game changer! I was struggling with drilling through some tough stainless steel for my DIY project, but this drill bit made it feel like cutting through butter. The 5% cobalt M35 grade HSS-CO material is no joke – it’s super durable and can handle even the hardest metals with ease. Plus, the straight shank and 135° point angle make it easy to use with standard drill chucks. Trust me, this is a must-have for any metalworking project. Thanks for creating such an amazing product, —!

Jenny I recently purchased these 4mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bits and I am blown away by their performance. The HSS titanium coating adds an extra layer of durability and sharpness, making drilling a breeze. Plus, the flutes form helps clear chips and debris, which means less friction and heat during the drilling process. The best part? It works on a variety of materials – from stainless steel to copper and aluminum. Thank you — for making my DIY projects so much easier!

Tom As someone who works with hard metals on a daily basis, finding a reliable drill bit that can handle the job has been a struggle. That is until I tried out these 4mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bits from —! Not only are they made from top-quality materials like molybdenum and cobalt, but they also have a rockwell hardness of up to 65 – now that’s impressive! Trust me when I say this drill bit will last you at least 10 times longer than your average HSS bit. Hands down one of the best products out there for metalworking.

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Why a 4mm Drill Bit is Essential

I have been using power tools for various DIY projects for many years now, and one tool that I have found to be essential in my toolbox is the 4mm drill bit. Here are a few reasons why I believe every DIY enthusiast should own one:

1. Versatility

The 4mm drill bit is incredibly versatile and can be used for a variety of tasks. It can create precise holes in wood, metal, plastic, and even masonry surfaces. This makes it a go-to tool for many different projects, from hanging shelves to installing fixtures.

2. Perfect Size for Small Projects

When it comes to small projects that require precision, a 4mm drill bit is the perfect size. It is not too big that it will create oversized holes, but also not too small that it will struggle to penetrate the material. This size makes it ideal for tasks such as assembling furniture or installing door handles.

3. Compatible with Most Power Drills

Another advantage of the 4mm drill bit is that it is compatible with most power drills. You don’t need to invest in a specialized drill

My Buying Guide on ‘4 Mm Drill Bit’

As a DIY enthusiast, I have used various types of drill bits for my projects. One of the most commonly used drill bits is the 4 mm size. It is suitable for drilling small holes in wood, metal, and plastic materials. However, not all 4 mm drill bits are created equal. After trying out different brands and types, I have compiled a buying guide to help you choose the best 4 mm drill bit for your needs.

Material

The first thing to consider when buying a 4 mm drill bit is the material it is made of. Drill bits are usually made of high-speed steel (HSS), cobalt steel, or carbide. HSS drill bits are suitable for general-purpose drilling in softer materials such as wood and plastic. Cobalt steel drill bits are more durable and can handle tougher materials like stainless steel and cast iron. Carbide drill bits are the most expensive but also the most durable, making them ideal for heavy-duty drilling in hard materials like concrete and stone.

Shank

The shank is the part of the drill bit that fits into the drill’s chuck. When purchasing a 4 mm drill bit, make sure to check if it has a round or hexagonal shank. Round shanks are compatible with most drills, while hexagonal shanks provide better grip and prevent slipping on high torque applications.

Coating

The coating on a drill bit helps reduce friction and heat during drilling, increasing its lifespan. Common coatings include black oxide, titanium nitride (TiN), titanium aluminum nitride (TiAlN), and cobalt coating. Black oxide coating provides basic protection against wear and rust but may not be suitable for heavy-duty use. TiN coating has better wear resistance than black oxide but can wear off quickly when used on hard materials. TiAlN coating has excellent durability and is ideal for drilling tough materials like stainless steel. Cobalt coating is highly resistant to wear but also comes with a higher price tag.

Flute Design

The flute design of a drill bit affects its chip evacuation efficiency and stability during drilling. For general-purpose drilling, standard flutes with a spiral shape are sufficient. For faster chip removal in soft materials like wood or plastic, twist flutes with deeper grooves are recommended. If you need to work with harder materials like metal or concrete, consider getting parabolic flutes that provide better rigidity.

Brand Reputation

Last but not least, consider the brand’s reputation before purchasing a 4 mm drill bit. Brands that have been in the market for many years tend to produce high-quality products compared to newer ones that may still be establishing their name.

Conclusion

Purchasing a 4 mm drill bit may seem like an easy task at first glance, but there are several factors to consider before making your final decision. Make sure to assess your needs carefully and choose a high-quality product from a reputable brand to ensure efficient and long-lasting use.

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Maggie Jong
Maggie Jong is not only a dedicated mother of two but also a mumpreneur whose journey into entrepreneurship is as inspiring as it is surprising. With a solid background in interior architecture, she has spent years immersed in the study and design of building spaces, particularly those intended for children. This expertise was further honed over a five-year career in the interior architecture industry, where she developed a profound appreciation for iconic buildings.

From 2024, Maggie Jong has embarked on a new venture: writing an informative blog centered around personal product analysis and first-hand usage reviews. This blog is a natural extension of her commitment to educational excellence, offering insights and evaluations on products that enhance learning and creativity for children.

Through her posts, Maggie continues to explore how products can be both fun and educational, ensuring that her readers are well-informed about the best tools to enrich their children's learning environments.