When tackling projects involving metal, having the best metal drill bits is crucial for efficiency, precision, and safety. A subpar drill bit can quickly dull, overheat, or even break, leading to frustration and wasted materials. Whether you’re a professional tradesperson, a dedicated DIY enthusiast, or simply need to drill through various metal types, investing in a high-quality drill bit set designed for durability and performance is paramount. This comprehensive guide reviews some of the top-rated metal drill bits available, helping you make an informed decision to power through tough materials with ease.
Quick Product Comparison
Our Top 5 Best Metal Drill Bit Reviews – Expert Tested & Recommended
1. DEWALT 21-Piece Titanium Nitride Coated Pilot Point Drill Bit Set for Metal
The DEWALT 21-Piece Titanium Nitride Coated Pilot Point Drill Bit Set is engineered for exceptional quality and performance in metal drilling applications. Featuring a robust titanium nitride coating, these bits offer increased durability and a longer lifespan. The innovative pilot point tip ensures precise starts on contact, preventing bit walking and resulting in cleaner, more accurate holes every time.
Key Features That Stand Out
- ✓ Titanium Nitride Coating: Enhances surface hardness for increased durability and heat resistance.
- ✓ Pilot Point Tip: Designed for immediate contact and reduced walking, ensuring clean and accurate holes.
- ✓ Optimized Flute Design: Facilitates efficient chip removal, reducing heat buildup and prolonging bit life.
- ✓ No-Spin Shank: Prevents bit from slipping in the chuck, improving control and safety.
Why We Recommend It
We recommend this DEWALT drill bit set for its superior construction and thoughtful design. The combination of titanium nitride coating and the pilot point tip makes it incredibly effective for drilling through various metals, providing both speed and precision. Its ability to start holes accurately without walking is a significant advantage, especially for critical applications.
Best For
This set is ideal for professionals and serious DIYers who frequently work with metals, require precise hole starting, and demand long-lasting, reliable drill bits for a wide range of tasks.
Pros and Cons
Pros:
- Excellent durability due to Titanium Nitride coating.
- Pilot Point tip ensures accurate, no-walk starts.
- Efficient chip removal reduces heat and wear.
- Variety of sizes in a convenient, sturdy case.
Cons:
- Can be more expensive than basic HSS sets.
- Coating can eventually wear off with heavy use.
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: “I bought this set for a project involving thick steel, and they performed flawlessly. The pilot point really makes a difference in getting a clean start. Definitely recommend for anyone serious about metalwork.”
2. Champion HSS Mechanics Length Drill Bit Set, 29-Piece, 1/16-1/2″, 135° Split Point for Metal
The Champion HSS Mechanics Length Drill Bit Set is a premium 29-piece collection designed for superior performance and longevity in drilling metal. These bits boast a 135-degree split point for instant contact and minimal walking, ensuring accuracy. Constructed from High-Speed Steel (HSS), they offer remarkable flexibility, reducing the risk of chipping or snapping often seen with more brittle cobalt bits, while still providing excellent wear resistance.
Key Features That Stand Out
- ✓ Mechanics Length Design: Shorter overall length provides added strength and rigidity, reducing breakage.
- ✓ 135-Degree Split Point: Allows for quick, accurate starts without pre-drilling, even on curved surfaces.
- ✓ Tapered Web Geometry: Increases bit strength and enhances chip evacuation for cooler drilling.
- ✓ Flatted Shanks: Ensures secure grip in keyless power tools, preventing slippage.
Why We Recommend It
We highly recommend the Champion HSS set for its exceptional balance of flexibility, strength, and cutting speed. It’s often praised for outperforming some cobalt drills in terms of durability against chipping, making it a reliable choice for demanding applications. The comprehensive size range in this 29-piece set covers almost all common drilling needs.
Best For
This set is perfect for mechanics, fabricators, and serious DIYers who require a versatile and robust set of drill bits for consistent, heavy-duty drilling in various metals, including stainless steel, cast iron, and structural steel.
Pros and Cons
Pros:
- Superior flexibility reduces chipping compared to cobalt.
- Drills faster and lasts longer than many competitors.
- Excellent for accurate starting with its split point.
- Mechanics length adds rigidity and resistance to breakage.
Cons:
- Higher price point compared to basic HSS sets.
- HSS may not match the extreme heat resistance of pure Cobalt for very specific, extreme applications.
Customer Reviews
Customer Review: “Champion bits are the best you can buy. I used to use them exclusively to drill and tap holes for safe alarms. I had to drill out holes in stainless exhaust pipes recently and these were the only bits that could do the job.”
Customer Review: “These bits are incredibly durable. I’ve drilled through thick steel plates multiple times, and they’ve held their edge remarkably well. The shorter length truly makes a difference in stability.”
3. DEWALT Drill Bit Set, 3-Flats Shank, 14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal
The DEWALT 14-Piece Drill Bit Set offers a versatile and budget-friendly solution for drilling across various materials, including metal, wood, and plastic. These high-speed steel (HSS) bits feature a 135-degree split point tip, which significantly reduces walking and allows for quick, clean starts without the need for a pilot hole. The tapered web design further enhances their durability and resistance to breakage, making them reliable for general use.
Key Features That Stand Out
- ✓ 135-Degree Split Point Tip: Minimizes walking for precise and clean hole starts.
- ✓ High-Speed Steel (HSS) Construction: Provides good wear resistance for drilling in multiple materials.
- ✓ Tapered Web Design: Offers extreme durability and helps resist breakage, especially during tough applications.
- ✓ 3-Flat Shank: Prevents bits from slipping in the drill chuck, ensuring a secure grip and improved power transfer.
Why We Recommend It
This DEWALT set is an excellent choice for those seeking a reliable and affordable all-around drill bit kit. While not specialized for the hardest metals like some cobalt options, its performance across plastic, wood, and lighter metals is impressive for its price point. The anti-slip shank and anti-walk tip make it user-friendly and effective for a wide range of household and light-duty professional tasks.
Best For
This set is best for homeowners, hobbyists, and light-duty contractors who need a dependable and economical drill bit set for general-purpose drilling in various materials, including softer metals, wood, and plastic.
Pros and Cons
Pros:
- Cost-effective solution for multi-material drilling.
- Split point tip provides accurate, no-walk starts.
- Durable tapered web design for increased lifespan.
- 3-flat shank ensures no slippage in the chuck.
Cons:
- Less effective on very hard or thick metals compared to cobalt or titanium-coated bits.
- 14-piece set might not cover all niche sizes.
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!”
4. Drill America – KFD29J-PC 29 Piece Heavy Duty High Speed Steel Drill Bit Set with Black and Gold
The Drill America KFD29J-PC 29 Piece Heavy Duty High Speed Steel Drill Bit Set is an extensive collection designed for robust performance across various demanding drilling tasks. These jobber length bits, ranging from 1/16″ to 1/2″ in 1/64″ increments, are made from high-speed steel (HSS) to ensure wear resistance. The distinctive black and gold oxide finish not only enhances corrosion resistance but also increases the hardness of the drill bit, contributing to its overall durability and reliability for daily use.
Key Features That Stand Out
- ✓ Comprehensive 29-Piece Set: Includes a wide range of inch sizes from 1/16″ to 1/2″ for versatile use.
- ✓ High-Speed Steel (HSS) Construction: Delivers excellent hardness and wear resistance for prolonged tool life.
- ✓ Black and Gold Oxide Finish: Provides superior corrosion resistance and increases bit hardness, preventing premature dulling.
- ✓ Heavy-Duty Design: Engineered for tougher applications, ensuring reliability and robustness.
Why We Recommend It
This Drill America set stands out for its comprehensive range of sizes and its heavy-duty HSS construction with a black and gold oxide finish. It offers a fantastic balance of value and performance for users who need a complete set capable of handling various metal drilling tasks without breaking the bank. The finish adds an extra layer of protection, making these bits a long-lasting addition to any toolkit.
Best For
This drill bit set is best for machinists, metalworkers, and serious hobbyists who need a broad range of durable drill bits for general-purpose to heavy-duty drilling in mild steel, cast iron, and other ferrous metals.
Pros and Cons
Pros:
- Extremely comprehensive size range for all drilling needs.
- HSS with black and gold oxide offers good durability and corrosion resistance.
- Reliable for heavy-duty and general-purpose metal drilling.
- Comes in a sturdy index case for easy organization.
Cons:
- May not be as effective as cobalt bits for drilling very hard or stainless steels.
- The index case can sometimes be stiff or tricky to open.
Customer Reviews
Customer Review: “Quality set of drills. I bought one for a friend of mine and gave it to him as a present and I liked him so much. I bought one for myself a year later definitely would buy them again. They should last you a lifetime.”
Customer Review: “These bits are solid workhorses. I’ve used them on everything from sheet metal to some thicker steel, and they hold up. The black and gold finish seems to make a real difference in preventing rust.”
5. BOSCH Cobalt M42 Metal Drill Bits with Three-Flat Shank for Stainless Steel, Cast Iron, Titanium
The BOSCH Cobalt M42 Metal Drill Bits are premium jobber-length bits specifically engineered for drilling into the toughest metals, including stainless steel, cast iron, and titanium. Composed of an enhanced M42 alloy with 8% Cobalt, these bits offer exceptional durability and superior heat resistance, extending their lifespan significantly compared to standard bits. The three-flat shank design ensures a secure grip in the chuck, preventing slippage even under high torque applications.
Key Features That Stand Out
- ✓ M42 Cobalt Alloy: Contains 8% cobalt for maximum hardness, heat resistance, and extended life.
- ✓ Three-Flat Shank: Provides a firm, non-slip grip in drill chucks, crucial for high-power drilling.
- ✓ High-Heat Resistant: Designed to withstand extreme temperatures encountered when drilling hard metals.
- ✓ Precision Ground: Offers sharp cutting edges for fast material removal and clean, accurate holes.
Why We Recommend It
For those frequently working with challenging materials like stainless steel or hardened alloys, the BOSCH Cobalt M42 bits are an indispensable tool. Their high cobalt content and robust construction allow them to maintain a sharp edge and resist heat much better than standard HSS bits, offering outstanding longevity and cutting performance. While a higher investment, they deliver superior results where other bits might fail.
Best For
This set is ideal for professionals in fabrication, plumbing, automotive repair, and anyone needing to drill into extremely hard or abrasive metals, including stainless steel, titanium, and cast iron, where durability and heat resistance are paramount.
Pros and Cons
Pros:
- Exceptional durability and heat resistance due to 8% M42 Cobalt.
- Significantly longer life when drilling hard materials.
- Three-flat shank prevents slipping in demanding applications.
- Excellent for stainless steel, cast iron, and titanium.
Cons:
- More brittle than HSS bits, susceptible to snapping if misused or dropped.
- Higher cost compared to HSS or TiN-coated drill bits.
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”
Complete Buying Guide for Best Metal Drill Bit
Essential Factors We Consider
When selecting the best metal drill bits, several critical factors influence performance and longevity. First, the material of the bit is paramount. High-Speed Steel (HSS) bits are common for general use, while Titanium Nitride (TiN) coated bits offer enhanced hardness and heat resistance. For the toughest metals like stainless steel or cast iron, Cobalt (M35 or M42) drill bits are typically the superior choice due to their increased heat tolerance and strength. The tip geometry, specifically the split point angle (118° vs. 135°), affects how easily the bit starts and prevents walking. A 135° split point is preferred for metal as it starts on contact and requires less force. Shank design, such as three-flat shanks, is important for preventing slippage in the drill chuck, especially when drilling tough materials. Finally, consider the set size and variety to ensure you have the right range of diameters for your projects.
Budget Planning
Your budget will significantly influence the type and quality of metal drill bits you can purchase. Basic HSS sets are the most affordable and suitable for occasional light-duty metalwork. Stepping up to TiN-coated HSS bits offers better durability for a moderate price, making them a good value for frequent DIYers. For professionals or those tackling demanding projects with hard metals, investing in a high-quality cobalt set, though more expensive upfront, will pay off in terms of performance, reduced bit changes, and overall longevity. Consider the long-term cost-effectiveness: a cheaper set that dulls quickly might end up costing more in replacements and wasted time.
Final Thoughts
Choosing the right metal drill bit is an investment in your tools and your project’s success. By prioritizing bit material, tip design, and shank type based on your specific needs, you can ensure a smoother, more efficient drilling experience. Always remember to use appropriate cutting fluid and proper drilling techniques to maximize the life and performance of your drill bits, regardless of their material or coating.
Frequently Asked Questions
Q: What is the difference between HSS, TiN-coated, and Cobalt drill bits for metal?
A: HSS (High-Speed Steel) bits are general-purpose, suitable for soft metals. TiN (Titanium Nitride) coated HSS bits have a harder surface and better heat resistance, extending their life. Cobalt (M35 or M42) bits contain 5-8% cobalt alloy, offering superior heat and abrasion resistance, making them ideal for drilling hard metals like stainless steel and cast iron.
Q: Why do my drill bits keep breaking or dulling when drilling metal?
A: Common reasons include using the wrong type of bit for the metal, insufficient cutting fluid, drilling at too high a speed, applying too much pressure, or poor bit geometry (e.g., a dull tip or wrong point angle). Always match the bit to the material, use lubricant, and maintain proper drilling speed and pressure.
Q: What is a 135-degree split point tip, and why is it important for metal?
A: A 135-degree split point tip is a self-centering design that allows the drill bit to start drilling on contact without needing a pilot hole or center punch. This feature is crucial for metal drilling as it prevents the bit from “walking” or wandering across the surface, resulting in cleaner, more accurate holes and reducing the force required to start drilling.
Q: Do I need cutting fluid when drilling metal?
A: Yes, using a proper cutting fluid (or coolant) is highly recommended when drilling metal. It helps to dissipate heat generated during drilling, lubricates the cutting edge, and flushes away chips. This significantly extends the life of your drill bit, improves cutting performance, and results in a cleaner hole.
Q: How do I properly store my metal drill bits to keep them sharp?
A: Store your drill bits in a designated drill index or case that keeps them separated and protected from impact. This prevents damage to the cutting edges. Keep them clean and dry to avoid corrosion, especially for uncoated HSS bits. Some users also apply a light oil film for extra protection during long-term storage.
Selecting the best metal drill bits is a critical step towards achieving professional results in your metalworking projects. From the versatile DEWALT Titanium Nitride set to the heavy-duty BOSCH Cobalt M42, each product reviewed offers specific advantages for different applications and material types. By considering the material, coating, and design features, you can confidently choose a set that meets your needs for durability, precision, and efficiency. Don’t let a dull or inadequate drill bit hinder your progress—invest wisely today and experience the difference a quality tool makes. Click on the “Check Price on Amazon” buttons above to find the perfect metal drill bit set for your toolkit!
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.
