Finding the best drill bits for metal is crucial for any project involving steel, aluminum, brass, or other alloys. Using the right bit not only ensures cleaner, more precise holes but also prolongs the life of your tools and prevents frustration. From hobbyists to seasoned professionals, selecting a drill bit designed for metal drilling, often featuring materials like Cobalt or Titanium Nitride (TiN) coatings, makes a significant difference in performance and durability. This comprehensive guide will help you navigate the options and choose the perfect set for your metalworking needs, ensuring efficiency and superior results every time you tackle a challenging material.
Quick Product Comparison
Our Top 5 Best Drill Bits For Metal Reviews – Expert Tested & Recommended
1. Alloy Steel Drill Bit Set: Ideal for Metal, Wood, Plastic, Masonry; Driver Bits & Case
The Alloy Steel Drill Bit Set stands out as an incredibly versatile option, offering a comprehensive collection for diverse projects. With 100 pieces, it’s designed to handle everything from intricate repairs to significant installations across various materials including metal, wood, plastic, and masonry. Crafted from durable alloy steel with a quenching treatment, these bits are built for resilience and dependable daily use.
Key Features That Stand Out
- ✓ 100-piece drill and driver multi-bit set for ultimate versatility.
- ✓ Ideal for drilling into metal, wood, plastic, and masonry.
- ✓ Includes 52 drill bits, 8 nut sockets, magnetic bit holder, and 4 hole saws.
- ✓ Made of durable, wear-resistant alloy steel with quenching treatment for enhanced strength.
- ✓ Perfect for daily use, offering outstanding durability and reliability.
Why We Recommend It
We recommend this set for its sheer versatility and robust construction. It’s an excellent all-in-one solution for DIY enthusiasts and professionals who work with multiple materials, particularly those requiring reliable metal drilling capabilities. The durable alloy steel ensures longevity, making it a valuable addition to any toolkit.
Best For
This set is best for general-purpose drilling across various materials, including light to medium-duty metal fabrication, household repairs, and hobby projects requiring a wide range of bit types.
Pros and Cons
Pros:
- Extremely comprehensive set covers almost every drilling and driving need.
- Highly versatile, suitable for a wide range of materials (metal, wood, plastic, masonry).
- Durable alloy steel construction with quenching treatment enhances tool life.
- Includes useful accessories like nut sockets and hole saws.
Cons:
- May not be as specialized for extremely hard metals as dedicated cobalt bits.
- The large number of pieces might mean some bits are rarely used by individual users.
Customer Reviews
Customer Review: A Must-Have for Any DIY Enthusiast!I recently purchased this drill and driver bit set, and I’m incredibly impressed with the quality and versatility it offers. From tackling simple household repairs to more complex projects, this set has everything I need.The variety of drill bits and driver bits is great.
Customer Review: A Must-Have for Any DIY Enthusiast!I recently purchased this drill and driver bit set, and I’m incredibly impressed with the quality and versatility it offers. From tackling simple household repairs to more complex projects, this set has everything I need.The variety of drill bits and driver bits is great.
2. 29-Piece Cobalt HSS Drill Bit Set with 135-Degree Tip for Drilling Metal and Stainless Steel
For those serious about drilling through tough materials, the 29-Piece Cobalt HSS Drill Bit Set is an excellent choice. Featuring a robust combination of high-speed steel and a black and gold oxide finish, these bits offer superior corrosion and wear resistance. The 135-degree split point tip ensures quick, efficient penetration and reduced thrust, making it ideal for drilling metal and especially challenging materials like stainless steel.
Key Features That Stand Out
- ✓ Comprehensive 29-piece set covering common drill bit sizes.
- ✓ Constructed from Cobalt High-Speed Steel (HSS) for enhanced durability.
- ✓ 135-degree split point tip for self-centering and fast penetration, reducing bit walking.
- ✓ Black and gold oxide finish boosts corrosion and wear resistance, extending bit life.
- ✓ Professionally hardened and polished tips ensure precise and clean holes in tough metals.
Why We Recommend It
This set is highly recommended for its exceptional performance on hard metals, including stainless steel. The combination of Cobalt HSS and the 135-degree split point makes for a drill bit that cuts efficiently, stays sharp longer, and resists heat, providing excellent value for demanding tasks.
Best For
Ideal for professionals and serious DIYers who frequently work with stainless steel, cast iron, and other challenging hard metals, requiring precision and durability.
Pros and Cons
Pros:
- Superior performance on hardened steel and stainless steel.
- 135-degree split point ensures accurate, quick starts without needing a pilot hole.
- Cobalt HSS construction offers excellent heat and abrasion resistance.
- Black and gold oxide finish provides extra protection against rust and wear.
Cons:
- Can be more expensive than standard HSS drill bit sets.
- Requires proper drilling technique and coolant to maximize lifespan when working with very hard materials.
Customer Reviews
Customer Review: Very nice set for a good price. Worth the moneyRead more
Customer Review: Very nice set for a good price. Worth the moneyRead more
3. M35 Cobalt Stubby Drill Bit Set for Hardened Steel, Metal, and Carbide with 1/4″ Hex Shank
The M35 Cobalt Stubby Drill Bit Set is a powerful and practical option for working with extremely tough materials like hardened steel, metal, and even carbide. Crafted from M35 cobalt high-speed steel, these bits offer enhanced durability and heat resistance, further fortified with a protective coating. Their stubby design and 1/4″ hex shank make them excellent for tight spaces and quick bit changes.
Key Features That Stand Out
- ✓ Constructed from premium M35 cobalt high-speed steel for superior hardness and heat resistance.
- ✓ Features a 1/4″ hex shank for secure grip and quick changes in impact drivers.
- ✓ Stubby design minimizes breakage and allows access in confined areas.
- ✓ Excellent stability and efficient chip evacuation for smoother cutting and extended blade life.
- ✓ Includes 5 popular sizes (3/32″ to 5/16″) and a larger 3/8″ size, suitable for various hard metal drilling tasks.
Why We Recommend It
This set is highly recommended for its exceptional performance on challenging materials where standard bits fail. The M35 cobalt and stubby design make these bits highly durable and effective for jobs requiring strength and precision in tough metal applications.
Best For
This drill bit set is best for drilling through hardened steel, high-tensile metal, and carbide, especially in situations requiring a compact drill bit or an impact driver.
Pros and Cons
Pros:
- Excellent for extremely hard materials like hardened steel and carbide.
- M35 cobalt provides superior heat resistance and longevity.
- 1/4″ hex shank is compatible with impact drivers and prevents slippage.
- Stubby design reduces bit flex and risk of breakage.
Cons:
- Limited range of sizes compared to full-length sets.
- Not suitable for deep drilling applications due to the stubby length.
Customer Reviews
Customer Review: Was able to drill through steel easily. Ruined a lot of bits prior to getting these
Customer Review: Was able to drill through steel easily. Ruined a lot of bits prior to getting theseRead more
4. Stark USA 29-Piece M35 Cobalt Drill Bit Set for Steel and Hard Metal 1/16″-1/2″
The Stark USA 29-Piece M35 Cobalt Drill Bit Set is engineered for professional-grade performance when working with steel and hard metals. This comprehensive set, ranging from 1/16″ to 1/2″, features M35 cobalt steel construction, which includes molybdenum and cobalt for a hardened alloy. The 135-degree split point precision design and 3-flat shank ensure accurate starts and prevent spinning, making it a reliable choice for demanding applications.
Key Features That Stand Out
- ✓ Professional 29-piece set, ideal for versatile applications in steel and hard metals.
- ✓ Manufactured from M35 cobalt steel, providing high hardness up to 67 Rockwell.
- ✓ 135-degree split point tip for precise, self-centering starts, eliminating bit walking.
- ✓ 3-flat shank design prevents slippage in the drill chuck, ensuring stability.
- ✓ Gold oxide finish offers enhanced corrosion resistance and improved lubricity.
Why We Recommend It
We recommend this set for its robust construction and exceptional capability in drilling hard metals. The M35 cobalt material, combined with the 135-degree split point and 3-flat shank, provides a powerful and reliable solution for consistent, clean holes in challenging materials.
Best For
This set is best for professionals and serious DIYers tackling projects involving tough steel, cast iron, and other hard metals, where durability and precision across a range of sizes are essential.
Pros and Cons
Pros:
- Excellent for drilling through hard and abrasive metals, including stainless steel.
- Comprehensive size range (1/16″ to 1/2″) covers most common applications.
- 135-degree split point reduces thrust and ensures quick, accurate starts.
- 3-flat shank provides a secure grip in the chuck, preventing spin-out.
Cons:
- Higher upfront cost compared to standard HSS bits.
- Requires proper drilling speed and cutting fluid for optimal performance and lifespan.
Customer Reviews
Customer Review: Excellent drill bit set, great price, arrived in two days! I used three drill bits so far, measured them to check, and all were the size they were supposed to be. No drills had fallen out of their places, case is very good. It even has a place to put a #2 starting bit (not included), so don’t be
Customer Review: first impressions are very good. the box is made in the USA and the bits are China. they appear to be of good quality going off of years of drilling and taping holes in steel. I will add more latter.
5. DEWALT 21-Piece Titanium Nitride Coated Drill Bit Set with Pilot Point for Metal
The DEWALT 21-Piece Titanium Nitride Coated Drill Bit Set is a reliable choice for general-purpose metal drilling, offering a balance of durability and precision. The Titanium Nitride (TiN) coating provides a harder surface and reduces friction, extending bit life. Coupled with the innovative Pilot Point tip, these bits start on contact, preventing walking and ensuring cleaner, more accurate holes from the first touch.
Key Features That Stand Out
- ✓ Features a Titanium Nitride (TiN) coating for increased durability and reduced friction.
- ✓ Patented Pilot Point tip starts on contact, eliminating bit walking and producing clean, accurate holes.
- ✓ Designed for longer life, even with frequent use in various metals.
- ✓ Provides efficient material removal for faster drilling.
- ✓ Durable case for convenient storage and organization of the 21-piece set.
Why We Recommend It
This DEWALT set is highly recommended for its excellent balance of performance and value. The TiN coating and Pilot Point tip make drilling into metal much easier and more precise for everyday tasks, reducing the need for center punching and enhancing overall efficiency.
Best For
This set is ideal for everyday metal drilling tasks in common materials like aluminum, brass, mild steel, and wood, suitable for both DIY enthusiasts and general contractors.
Pros and Cons
Pros:
- Titanium Nitride coating enhances durability and provides longer bit life.
- Pilot Point tip ensures accurate starts and prevents bit walking.
- Produces cleaner holes with less burring.
- Reputable DEWALT brand quality and reliability.
Cons:
- Less effective on extremely hardened steel or exotic alloys compared to cobalt bits.
- The TiN coating can wear off over extended 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: 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
Complete Buying Guide for Best Drill Bits For Metal
Choosing the best drill bits for metal can significantly impact the success and efficiency of your projects. When working with various types of metal, from soft aluminum to tough stainless steel, having the right tools is paramount. This guide covers the essential factors we consider when recommending drill bits, helping you make an informed decision for your specific needs.
Essential Factors We Consider
When selecting drill bits for metal, several critical factors come into play:
- Material Composition: The primary factor is the bit’s material. High-Speed Steel (HSS) bits are good for softer metals. For harder metals like stainless steel or cast iron, Cobalt (M35 or M42) drill bits are superior due to their heat resistance and hardness. Titanium Nitride (TiN) coated HSS bits offer a good balance, providing increased durability and reduced friction for general metal drilling.
- Drill Bit Design: Look for features like a 135-degree split point tip, which helps bits start on contact without walking, making pilot holes unnecessary for most applications. A 3-flat shank is beneficial for preventing slippage in the drill chuck, especially when working with high torque.
- Size and Set Variety: Consider the range of sizes you’ll need. A comprehensive set covers various project requirements, while specialized stubby bits might be ideal for confined spaces or specific tasks requiring extra rigidity.
- Durability and Longevity: The quality of the material and any coatings directly impact how long the drill bits will last. Cobalt bits generally offer the best longevity in hard metals, while TiN coatings extend the life of HSS bits.
- Heat Management: Drilling metal generates significant heat, which can dull bits quickly. Materials like cobalt handle heat better, and proper use of cutting fluid is always recommended to preserve bit life.
Budget Planning
Drill bit sets for metal range in price based on material, size, and brand. Standard HSS sets are the most affordable, suitable for occasional light-duty work. TiN-coated HSS bits offer a step up in performance and price, providing good value for regular use. For professional use or frequent work with hardened materials, investing in a high-quality cobalt drill bit set is highly recommended, as their superior durability and cutting ability will save money and frustration in the long run. Consider your typical projects and frequency of use when setting your budget.
Final Thoughts
Ultimately, the best drill bits for metal depend on the specific types of metal you’ll be working with and the demands of your projects. For versatility and general tasks, a comprehensive alloy steel or TiN-coated HSS set works well. However, for serious work on hardened steel, stainless steel, or other challenging alloys, M35 or M42 cobalt drill bits are an invaluable investment. Always prioritize quality and choose bits that match the toughness of your material for optimal results and tool longevity.
Frequently Asked Questions
Q: What kind of drill bit is best for drilling through thick metal?
A: For drilling through thick or hard metal, Cobalt drill bits (M35 or M42) are generally considered the best. They are made from high-speed steel mixed with cobalt, which gives them superior heat resistance and hardness, allowing them to cut through tough materials like stainless steel, cast iron, and even hardened steel more effectively and last longer.
Q: Can I use a regular HSS drill bit for metal?
A: Yes, you can use regular High-Speed Steel (HSS) drill bits for drilling into softer metals like aluminum, brass, or mild steel. However, for harder metals, they will dull quickly and generate more heat, which can damage the bit and the workpiece. For tougher metals, HSS bits with a Titanium Nitride (TiN) coating or, ideally, Cobalt bits are recommended.
Q: What is the difference between a 118-degree and a 135-degree drill bit tip?
A: A 118-degree drill bit tip is a standard angle suitable for general-purpose drilling in softer materials. A 135-degree split point tip, however, is sharper and designed for self-centering, meaning it starts drilling on contact without walking. This design is highly beneficial for drilling metal, especially harder metals, as it reduces thrust and allows for faster, more precise penetration without the need for a pilot hole.
Q: How can I extend the life of my drill bits when drilling metal?
A: To extend the life of your metal drill bits, always use appropriate cutting fluid or lubricant, which reduces friction and dissipates heat. Use the correct drilling speed (slower for harder metals) and apply steady, consistent pressure. Avoid overheating the bit, and clear chips frequently. For optimal performance, choose bits made from the right material (e.g., cobalt for hard metals) for the job.
Q: Are coated drill bits better for metal?
A: Yes, coated drill bits are generally better for metal. Coatings like Titanium Nitride (TiN) or black oxide increase the bit’s surface hardness, reduce friction, and improve heat resistance. This results in longer tool life, faster drilling speeds, and cleaner holes compared to uncoated HSS bits, especially in various metal applications.
Choosing the right drill bits for metal is a critical step towards successful and efficient projects. Whether you opt for the versatile multi-material sets, the heavy-duty cobalt options, or the precision of titanium-coated bits, investing in quality tools will pay off in durability and performance. Review our top recommendations and consider your specific project needs to select the best drill bits for metal that will serve you reliably for years to come. Shop now on Amazon and equip your toolkit with the power and precision you deserve!
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.
