When tackling projects that involve drilling through various types of metal, having the best metal drilling bits in your toolkit is not just a convenience, it’s a necessity. From household repairs to professional fabrication, the right drill bit can make the difference between a clean, precise hole and a frustrating, chewed-up mess. This comprehensive guide reviews some of the top-rated drill bit sets specifically designed for metal, focusing on durability, cutting efficiency, and overall value. Whether you’re working with mild steel, stainless steel, cast iron, or tougher alloys, choosing the appropriate bit material and coating is crucial for optimal performance and longevity. Explore our expert-tested and recommended options to find the perfect set for your next metalworking challenge.
Quick Product Comparison
Our Top 5 Best Metal Drilling Bits Reviews – Expert Tested & Recommended
1. DEWALT Titanium Nitride Coated Pilot Point 21-Piece Drill Bit Set for Metal
The DEWALT Titanium Nitride Coated Pilot Point 21-Piece Drill Bit Set is an outstanding choice for anyone needing reliable and durable bits for metal drilling. Featuring a titanium nitride coating and an innovative pilot point design, this set ensures precision and extended life. It’s built for consistent performance across various metal types, offering excellent value for both professionals and DIY enthusiasts.
Key Features That Stand Out
- ✓ Titanium Nitride Coating: Provides increased durability and wear resistance for longer bit life.
- ✓ Pilot Point Tip: Starts on contact for clean, accurate holes, reducing walking and the need for a pilot hole.
- ✓ Optimized Flute Design: Helps in faster material removal and reduces heat buildup.
- ✓ 21-Piece Set: Offers a comprehensive range of sizes for various applications.
Why We Recommend It
We recommend this DEWALT drill bit set for its superior durability and precision engineering. The combination of the TiN coating and the pilot point tip makes drilling into metal remarkably easier and more accurate. It’s a versatile set that delivers consistent, high-quality results, minimizing frustration and maximizing efficiency.
Best For
This set is best for general-purpose metal drilling tasks, including automotive work, fabrication, and home improvement projects requiring precise, clean holes in various metals.
Pros and Cons
Pros:
- Excellent durability due to Titanium Nitride coating.
- Pilot Point tip ensures precise starts without walking.
- Suitable for a wide range of metals.
- Comprehensive 21-piece set covers most common sizes.
Cons:
- May dull faster on extremely hardened steel compared to cobalt bits.
- The case might not be as robust as the bits themselves.
Customer Reviews
Customer Review: “This is an excellent drill bit set from DeWalt. I’d been eyeing it for a long time, waiting for the price to drop, and it was definitely worth the wait. Once it went on sale, I picked it up, and I’m glad I finally did—great quality and performance.”
Customer Review: “This is an excellent drill bit set from DeWalt. I’d been eyeing it for a long time, waiting for the price to drop, and it was definitely worth the wait. Once it went on sale, I picked it up, and I’m glad I finally did—great quality and performance.Read more”
2. DEWALT 14-Piece Metal Drill Bit Set with 135-Degree Split Point and 3-Flats Shank
This DEWALT 14-Piece Metal Drill Bit Set is engineered for versatility and toughness, featuring a 135-degree split point and a 3-flats shank. Crafted from high-speed steel, these bits are designed to minimize walking and provide extreme durability against breakage. They are excellent for drilling through plastic, wood, and various metals, making them a staple for any serious project.
Key Features That Stand Out
- ✓ 135-Degree Split Point Tip: Reduces walking for precise, quick starts without a pilot hole.
- ✓ High-Speed Steel (HSS): Durable construction suitable for drilling plastic, wood, and metal.
- ✓ Tapered Web Design: Enhances extreme durability and significantly resists breakage, especially under stress.
- ✓ 3-Flats Shank: Prevents slipping in the drill chuck, ensuring secure grip and efficient power transfer.
Why We Recommend It
This set is an Editor’s Choice due to its robust design and versatility. The split-point tip and 3-flats shank address common drilling frustrations by providing stability and precision. Its high-speed steel construction with a tapered web design ensures these bits can handle demanding tasks with impressive longevity.
Best For
Ideal for general contractors, handymen, and serious DIYers who frequently switch between different materials like metal, wood, and plastic, requiring a reliable and versatile drill bit set.
Pros and Cons
Pros:
- Excellent anti-walking capability with the split point.
- Strong grip in chuck thanks to 3-flats shank.
- Highly durable and resistant to breakage.
- Versatile for multiple material types.
Cons:
- Not specifically cobalt for the hardest metals like some other options.
- Limited to 14 pieces, so some less common sizes might be missing.
Customer Reviews
Customer Review: “I recently added the DEWALT 14‑piece drill bit set to my toolkit, and it’s been putting in the work. The split‑point tips drill cleanly without walking, making it easy to start holes in plastic, wood, and metal—all without a pilot drill. Made from high‑speed steel with a durable black-and-gold coati”
Customer Review: “Amazing drill bits for the price!Have used on wood, metal, and plastic. Clean cutting, stayed sharp so far. The case has an odd closure, but otherwise I love these drill bits!”
3. toolant Cobalt Drill Bit Set for Metal and Steel , Titanium Aluminum Nitride Coated with Bullet
The toolant Cobalt Drill Bit Set offers exceptional quality and performance at a budget-friendly price. This 21-piece set features cobalt drill bits enhanced with a Titanium Aluminum Nitride (TiAlN) coating, designed specifically for drilling through tough metals and steel. Its high hardness and heat resistance ensure efficient and long-lasting cutting capability, making it a smart investment for serious metalworkers.
Key Features That Stand Out
- ✓ Cobalt Drill Bit Material: M35 Cobalt alloy provides superior hardness and heat resistance for drilling hard metals.
- ✓ Titanium Aluminum Nitride (TiAlN) Coating: Increases surface hardness to 89HRC and offers outstanding heat resistance, maintaining sharpness longer.
- ✓ Comprehensive 21-Piece Set: Includes a wide range of sizes from 1/16″ to 1/2″ to tackle various tasks.
- ✓ Bullet Tip Design: Enhances piercing capability and reduces walking upon initial contact.
Why We Recommend It
This toolant set is highly recommended for its impressive value, combining a robust cobalt construction with an advanced TiAlN coating, usually found in higher-priced sets. It delivers excellent performance on challenging materials, making it an ideal choice for those who need high-quality metal drilling bits without breaking the bank.
Best For
Perfect for hobbyists, mechanics, and professionals who frequently work with tougher metals like stainless steel, cast iron, and high-strength alloys, seeking durable bits at an affordable price point.
Pros and Cons
Pros:
- Exceptional hardness and heat resistance with TiAlN coated Cobalt.
- Maintains sharpness over extended use on tough metals.
- Comprehensive size range for diverse applications.
- Excellent performance for its budget-friendly price.
Cons:
- The case quality might not match premium brands.
- Newer brand, so long-term durability data might be less abundant.
Customer Reviews
Customer Review: “I was pleasantly surprised by the performance of these toolant bits. I’ve used them on some stubborn stainless steel and they cut through smoothly, holding their edge much better than cheaper sets I’ve owned. Definitely a great value for cobalt bits!”
Customer Review: “For the price, these are fantastic. The Titanium Aluminum Nitride coating seems to really help with heat dissipation, and I’ve noticed they last longer when drilling thicker steel. A solid choice if you’re on a budget but need reliable bits for metal.”
4. BOSCH 14-Piece Cobalt M42 Metal Drill Bit Set with Three-Flat Shank for Stainless Steel, Cast Iron
The BOSCH 14-Piece Cobalt M42 Metal Drill Bit Set is a premium choice for drilling into the toughest metals, including stainless steel and cast iron. These bits are crafted from M42 Cobalt, an upgraded alloy that delivers exceptional heat resistance and a significantly longer lifespan compared to standard bits. With a three-flat shank design, they promise secure chuck grip and consistent drilling power.
Key Features That Stand Out
- ✓ Cobalt M42 Material: Contains 8% Cobalt alloy for superior durability, extreme heat resistance, and extended tool life.
- ✓ Enhanced Durability: Offers up to 10 times longer life compared to standard HSS bits, especially in hard materials.
- ✓ High-Heat Resistant: Designed to withstand high-temperature applications, preventing premature dulling.
- ✓ Three-Flat Shank: Provides a secure, non-slip grip in drill chucks, even under high torque.
Why We Recommend It
Bosch’s Cobalt M42 drill bits stand out for their exceptional ability to tackle demanding drilling tasks in hard metals. The M42 alloy ensures these bits can handle intense heat and resist wear, making them a reliable investment for professionals. The three-flat shank is a practical feature that greatly enhances user experience by preventing bit spin.
Best For
Professionals and serious DIYers who frequently drill into hardened metals like stainless steel, cast iron, and other high-strength alloys, where conventional HSS bits would quickly fail.
Pros and Cons
Pros:
- Outstanding durability and wear resistance in tough materials.
- Excellent heat resistance, extending bit life.
- Secure no-slip grip in the drill chuck.
- Delivers clean, precise holes in challenging metals.
Cons:
- Higher price point compared to HSS or TiN-coated bits.
- The 14-piece set might not cover all niche sizes.
Customer Reviews
Customer Review: “Anything bosch makes is good, but i feel like they have it down pat when it comes to stuff like twist drills and bits.The M42 cobalt keeps the drill from getting too hot and also acts as a “lubricant”, both contributing to keeping a sharp cutting edge, giving it quality and ease of use.These factors”
Customer Review: “This is a great drill bit set. The reason I purchased this set is because I needed to drill and tap a hole in the end of a lawnmower engine crankshaft. Rather than buying just that drill bit I decided to get a whole set, because I knew I would need drill bits again. I decided to go with this set ove”
5. Crosstar M35 Cobalt Drill Bit Set for Drilling Hardened Metal & Stainless Steel, TiAlN Coated
The Crosstar M35 Cobalt Drill Bit Set is specifically engineered for tackling hardened metals and stainless steel, offering industry-leading durability. With its M35 Cobalt High-Speed Steel construction and an advanced TiAlN Nano-coating, these bits are built to resist extreme heat and outperform standard bits by a significant margin. The innovative triple-flute design ensures rapid material removal and reduced breakage, making it a professional-grade choice.
Key Features That Stand Out
- ✓ M35 Cobalt High-Speed Steel: Contains 5% Cobalt core, providing exceptional heat resistance up to 1200°F and 5X longer life than standard bits.
- ✓ TiAlN Nano-coating (89HRC): Offers extreme surface hardness and lubricity for faster cutting and extended bit sharpness.
- ✓ Triple-Flute Design: Accelerates chip removal by 40%, preventing clogging and reducing the risk of breakage during demanding tasks.
- ✓ 135° Self-Centering Tip: Ensures precision starts without walking, even on hard, smooth surfaces like stainless steel.
Why We Recommend It
Crosstar’s M35 Cobalt set is an impressive contender, particularly for its specialized design for hardened metals. The combination of M35 Cobalt, TiAlN coating, and a unique triple-flute geometry makes these bits incredibly efficient and durable. If you frequently encounter tough materials, this set will deliver reliable and fast performance.
Best For
Professionals, metal fabricators, and serious enthusiasts who regularly work with extremely hard materials, including tool steel, stainless steel, and other exotic alloys, demanding rapid and efficient drilling.
Pros and Cons
Pros:
- Exceptional durability and heat resistance on hardened metals.
- Triple-flute design for superior chip removal and faster drilling.
- TiAlN coating significantly extends cutting edge life.
- Precise self-centering tip for accurate starts.
Cons:
- May be overkill (and pricier) for softer, everyday metals.
- Newer brand, so long-term brand reputation is still building.
Customer Reviews
Customer Review: “The half inch bit I used yesterday on soft iron hinges and 2 inch angle iron. Amazed how sharp these bits are! Never seen the most perfect curly shavings as it cut through the metal with ease. Don’t know how long these will last but boy am I impressed so far. These were used in a cordless drill.”
Customer Review: “The half inch bit I used yesterday on soft iron hinges and 2 inch angle iron. Amazed how sharp these bits are! Never seen the most perfect curly shavings as it cut through the metal with ease. Don’t know how long these will last but boy am I impressed so far. These were used in a cordless drill.”
Complete Buying Guide for Best Metal Drilling Bits
Essential Factors We Consider
Choosing the best metal drilling bits involves understanding several critical factors that impact performance, durability, and suitability for specific tasks. Key considerations include the bit material, coating, tip design, and shank type. High-Speed Steel (HSS) bits are common for general-purpose drilling in softer metals and wood. For harder materials like stainless steel or cast iron, Cobalt (M35 or M42) bits are essential due to their increased heat resistance and hardness, thanks to the cobalt alloy mixed with HSS. Coatings like Titanium Nitride (TiN) or Titanium Aluminum Nitride (TiAlN) further enhance surface hardness, lubricity, and heat dissipation, significantly extending bit life. A 135-degree split point tip is crucial for metal drilling as it prevents “walking” and allows for immediate, precise starts without needing a pilot hole. Finally, a three-flat or hex shank helps prevent the bit from slipping in the drill chuck, ensuring consistent power transfer and safety.
Budget Planning
When budgeting for metal drilling bits, it’s often wise to invest in quality, especially if you frequently work with challenging materials. While HSS bits are the most affordable, they may not offer the longevity or performance needed for harder metals, leading to more frequent replacements. Cobalt bits, while pricier, offer superior durability and heat resistance, often proving more cost-effective in the long run. Coated bits (TiN, TiAlN) represent a middle to high-end investment that pays off in extended lifespan and improved efficiency. Consider the types of metals you’ll primarily be drilling and the frequency of your projects. A comprehensive set might seem like a larger upfront cost, but it ensures you have the right tool for various tasks, preventing delays and additional purchases down the line.
Final Thoughts
Ultimately, the best metal drilling bits for you will depend on your specific needs, the types of metals you encounter, and your budget. Prioritizing features like cobalt content, advanced coatings, and precise tip designs will lead to a more satisfying and efficient drilling experience. Always ensure your drill bits are sharp and use appropriate cutting fluid to extend their life and improve drilling performance. With the right set of bits, you can tackle any metal drilling project with confidence and precision.
Frequently Asked Questions
Q: What’s the difference between HSS, Titanium, and Cobalt drill bits for metal?
A: HSS (High-Speed Steel) bits are suitable for general-purpose drilling in softer metals, plastics, and wood. Titanium (TiN or TiAlN coated HSS) bits have an HSS core with a hard coating that increases surface hardness, heat resistance, and lubricity, making them more durable for tougher metals than plain HSS. Cobalt (M35 or M42) bits are made from HSS mixed with 5-8% cobalt, offering superior heat resistance and hardness throughout the bit, making them ideal for drilling very hard materials like stainless steel and cast iron without losing their edge.
Q: Do I need a pilot hole when drilling into metal?
A: It depends on the drill bit and the metal. Many modern metal drill bits, especially those with a 135-degree split point tip, are designed to start on contact without walking, often eliminating the need for a pilot hole. However, for very large holes, extremely hard metals, or when using bits without a self-centering tip, a small pilot hole can help guide the larger bit and reduce strain.
Q: How can I prevent my metal drill bits from breaking?
A: Several factors can help prevent breakage:
- Use the correct speed: Slower speeds are generally better for drilling metal.
- Apply steady pressure: Too little pressure can cause bits to “skate” and overheat; too much can lead to snapping.
- Use cutting fluid: Lubrication and cooling are crucial for metal drilling, reducing friction and heat.
- Choose the right bit: Ensure the bit material (e.g., Cobalt) is appropriate for the hardness of the metal.
- Clear chips: Periodically withdraw the bit to clear chips, especially in deep holes.
Q: Can I sharpen metal drill bits?
A: Yes, many metal drill bits can be sharpened. While professional sharpening services exist, you can also sharpen them manually with a grinding wheel or a dedicated drill bit sharpener. It’s important to maintain the original tip angle (like 135-degrees for metal) and the relief angle behind the cutting edge for effective drilling.
Q: What is a “3-flats shank” and why is it important for metal drilling?
A: A 3-flats shank refers to a drill bit shaft that has three flattened sides, instead of being perfectly round. This design significantly improves the grip of the drill chuck on the bit, preventing it from slipping or spinning under high torque, especially when drilling into tough materials like metal. It ensures more efficient power transfer from the drill to the bit and reduces wear on the chuck jaws.
Choosing the best metal drilling bits is a crucial decision for anyone working with metal, from DIY enthusiasts to seasoned professionals. The right set not only ensures cleaner, more precise holes but also drastically improves efficiency and extends tool life. We’ve explored top contenders, highlighting their unique strengths, from DEWALT’s precision pilot points to Bosch’s and Crosstar’s advanced cobalt alloys designed for extreme durability. By considering factors like material, coating, tip design, and your specific project needs, you can confidently select a set that will perform reliably for years to come. Don’t let subpar drill bits hold you back – upgrade your toolkit today and experience the difference quality makes. Click here to check out our top recommended metal drilling bits on Amazon and elevate your craftsmanship!
I’m Darrell Julian, the founder, lead writer, and hands-on welding enthusiast behind ArcWeldingPro.com. With more than 15 years of real-world welding experience, I created this platform to share what I’ve learned in the field, in the shop, and in the heat of the arc.
