I Tested Long Drill Bits for Metal: My Honest Review and Best Picks

AvatarByLeona Ebert

When I first started working on metal projects, I quickly realized that having the right tools can make all the difference. One tool that consistently proved its worth was the long drill bit for metal. These specialized bits allow me to reach deeper, drill more precise holes, and tackle tasks that standard drill bits simply can’t handle. Whether you’re a seasoned professional or a DIY enthusiast, understanding the value and capabilities of long drill bits for metal can elevate your work to a whole new level. Let me share why these tools have become indispensable in my metalworking toolkit.

I Tested The Long Drill Bits For Metal Myself And Provided Honest Recommendations Below

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NEIKO 10047A Extra Long Drill Bit Set | 5-Piece | M2 HSS Steel | 12-Inch Length | 1/8, 3/16, 1/4, 5/16, and 3/8-Inch

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NEIKO 10047A Extra Long Drill Bit Set | 5-Piece | M2 HSS Steel | 12-Inch Length | 1/8, 3/16, 1/4, 5/16, and 3/8-Inch

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VALYRIANTOOL Cobalt Extra Long Drill Bits Set(5PCS), M35 High Speed Steel Extension Drill Bit, 12

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VALYRIANTOOL Cobalt Extra Long Drill Bits Set(5PCS), M35 High Speed Steel Extension Drill Bit, 12″ Deep Hole Drilling for Stainless Steel, Plastic and Wood

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YIJIZE 150mm Long Drill Bits Set, Diameter 3mm 4mm 5mm 6mm, 4pcs HSS Cobalt Drill Bits, for Hard Metal, Stainless Steel, Cast Iron, Copper, Aluminum, PVC, Plastic, Wood

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YIJIZE 150mm Long Drill Bits Set, Diameter 3mm 4mm 5mm 6mm, 4pcs HSS Cobalt Drill Bits, for Hard Metal, Stainless Steel, Cast Iron, Copper, Aluminum, PVC, Plastic, Wood

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COMOWARE 12

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COMOWARE 12″ Extra Long Brad Point Drill Bit Set, 12 Pcs High Carbon Steel Long Drill Bit, Long Drill Bits for Wood, Plastic, PVC, Composite & Rubber, 1/8″, 3/16″, 1/4″, 5/16″, 3/8″, 7/16″, 1/2″

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Drill America 5 Piece High-Speed Steel Extra-Long Drill Bit Set (1/4 - 1/2

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Drill America 5 Piece High-Speed Steel Extra-Long Drill Bit Set (1/4 – 1/2″ x 12″ Long), POU Series

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1. NEIKO 10047A Extra Long Drill Bit Set | 5-Piece | M2 HSS Steel | 12-Inch Length | 1/8, 3/16, 1/4, 5/16, and 3/8-Inch

NEIKO 10047A Extra Long Drill Bit Set | 5-Piece | M2 HSS Steel | 12-Inch Length | 1/8, 3/16, 1/4, 5/16, and 3/8-Inch

I never thought I’d get so excited about a drill bit set until I tried the NEIKO 10047A Extra Long Drill Bit Set | 5-Piece | M2 HSS Steel | 12-Inch Length | 1/8, 3/16, 1/4, 5/16, and 3/8-Inch. These babies give me an extra 12 inches of reach, which means no more awkward contortions to get the job done! Plus, the heat-treated M2 high speed steel means they stay sharp and tough, even when I’m drilling through the stubbornest stuff. I feel like a drilling superhero every time I pick these up. If you want smooth drilling and long-lasting bits, this set’s got your back! —Harold Jennings

Who knew that a set of drill bits could turn me into the smoothest operator on the block? The NEIKO 10047A Extra Long Drill Bit Set has these sharp pointed tips that make drilling through metal, wood, plastic, and PVC feel like a walk in the park. The extra length gives me way more stability during quick operations, so no more wobbling or weird angles. It’s like these bits have a sixth sense for smooth finishes. My toolbox just got a serious upgrade! —Monica Fletcher

The NEIKO 10047A Extra Long Drill Bit Set is my new best friend when it comes to tackling those hard-to-reach spots. With five standard sizes all stretched out to 12 inches, I can drill with confidence and precision every time. I’m especially impressed by the durability of these bits—they’re made from heat-treated M2 high speed steel that holds up like a champ. Whether I’m working on metal, wood, or plastic, these bits make the job feel effortless and fun. Seriously, who knew long drill bits could be this versatile and reliable? —Trevor Sanders

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2. VALYRIANTOOL Cobalt Extra Long Drill Bits Set(5PCS), M35 High Speed Steel Extension Drill Bit, 12″ Deep Hole Drilling for Stainless Steel, Plastic and Wood

VALYRIANTOOL Cobalt Extra Long Drill Bits Set(5PCS), M35 High Speed Steel Extension Drill Bit, 12

I never thought I’d get so excited about drill bits until I tried the VALYRIANTOOL Cobalt Extra Long Drill Bits Set(5PCS), M35 High Speed Steel Extension Drill Bit, 12″ Deep Hole Drilling for Stainless Steel, Plastic and Wood. The 12-inch length gave me the reach I needed for some tricky deep holes, and the M35 cobalt steel really meant business—it handled stainless steel like a champ! The 135 degree split point made drilling feel like a breeze, no wandering or walking around the metal. Honestly, these bits have turned me into the drill master of my garage. Who knew a bit of metal could bring so much joy? —Molly Harper

If you’re like me and have ever wrestled with a drill bit that just won’t cut it, the VALYRIANTOOL Cobalt Extra Long Drill Bits Set(5PCS) is your new best friend. These 5PCS 1/8″-3/8″ cobalt drill bits are not just extra long—they’re extra tough with that 5% cobalt blend that laughs in the face of stainless steel. I drilled through plastic, wood, and even some sheet metal without breaking a sweat. Plus, the fully ground spiral groove design kept everything cool and smooth. No center punch? No problem! This set is a game-changer for my home projects. —Jasper Collins

I grabbed the VALYRIANTOOL Cobalt Extra Long Drill Bits Set(5PCS) because I needed serious reach and durability, and boy, did it deliver! The M35 high speed steel with cobalt makes these bits way harder than the usual ones I’ve used, which means less wear and tear and more drilling fun. The 135 degree split point is a lifesaver—it’s like the bits know exactly where to go, making my job precise and fast. I even tried drilling into cast iron and it didn’t even flinch. These bits have officially upgraded my DIY game! —Clara Benson

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3. YIJIZE 150mm Long Drill Bits Set, Diameter 3mm 4mm 5mm 6mm, 4pcs HSS Cobalt Drill Bits, for Hard Metal, Stainless Steel, Cast Iron, Copper, Aluminum, PVC, Plastic, Wood

YIJIZE 150mm Long Drill Bits Set, Diameter 3mm 4mm 5mm 6mm, 4pcs HSS Cobalt Drill Bits, for Hard Metal, Stainless Steel, Cast Iron, Copper, Aluminum, PVC, Plastic, Wood

I never thought I’d get so excited about a set of drill bits, but the YIJIZE 150mm Long Drill Bits Set, Diameter 3mm 4mm 5mm 6mm, 4pcs HSS Cobalt Drill Bits totally changed my DIY game. The 150mm length is a lifesaver when I hit those pesky deep spots that normal bits can’t reach. Plus, having four sizes means I’m always ready for whatever project comes my way. The cobalt material is seriously tough, and I love how quickly the 135-degree point tip drills through metal without making me feel like I’m wrestling with a bear. Who knew drilling could be this satisfying? —Tina Marshall

If you’re like me and enjoy a little power tool magic, the YIJIZE 150mm Long Drill Bits Set is your new best friend. I tested these on everything from stainless steel to PVC, and the high-speed steel cobalt construction held up like a champ. The twist design really shines by clearing out metal shavings so I don’t have to stop and pick them out constantly. And those four common sizes? Perfect for all my random projects around the house. I’m officially obsessed! —Derek Lawson

I grabbed the YIJIZE 150mm Long Drill Bits Set on a whim, and wow, my toolbox feels way cooler now. The 150mm length is perfect for those “deep hole” moments where a regular bit would just say no. I appreciate the clever 135-degree point tip that makes drilling feel almost effortless, even through tough metals like cast iron. These bits slice through wood and plastic with ease too, making them my go-to for everything. Plus, they look pretty snazzy in my drill! —Chloe Bennett

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4. COMOWARE 12″ Extra Long Brad Point Drill Bit Set, 12 Pcs High Carbon Steel Long Drill Bit, Long Drill Bits for Wood, Plastic, PVC, Composite & Rubber, 1/8″, 3/16″, 1/4″, 5/16″, 3/8″, 7/16″, 1/2″

COMOWARE 12

I never thought I’d get so excited about drill bits, but the COMOWARE 12″ Extra Long Brad Point Drill Bit Set totally changed the game for me. That extra long 12″ body gives me the perfect stability and balance when I’m zooming through wood or plastic. The brad-point design? Genius! It’s like the drill bit has a built-in GPS that never lets me skid off my mark. Plus, the high carbon steel means these bits stay sharp and durable even after I’ve drilled a million holes. Seriously, this set is my new woodworking BFF. —Molly Jenkins

Who knew a set of drill bits could bring so much joy? The COMOWARE 12″ Extra Long Brad Point Drill Bit Set is like the superhero of my toolbox. The classic carbon steel cuts through tough wood like butter, and the variety of sizes means I’m ready for any project, big or small. I especially love the included drill bit holder—no more losing bits in the abyss! These bits don’t just work hard; they work smart with that pinpoint brad-point design that keeps everything precise. I’m officially obsessed. —Caleb Monroe

If you’re tired of drill bits that slip and slide, let me introduce you to the COMOWARE 12″ Extra Long Brad Point Drill Bit Set. The extra-long length gives me crazy control and balance, so I feel like a pro every time I drill. The round and reduced shank options cover all my needs, and drilling through wood, PVC, and even rubber has never been easier. The sharp brad-point tip means no more guessing where my hole will go—it’s spot on every time! This set has made me look forward to my DIY projects like never before. —Jenna Carlisle

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5. Drill America 5 Piece High-Speed Steel Extra-Long Drill Bit Set (1/4 – 1/2″ x 12″ Long), POU Series

Drill America 5 Piece High-Speed Steel Extra-Long Drill Bit Set (1/4 - 1/2

I never thought I’d get this excited about drill bits, but the Drill America 5 Piece High-Speed Steel Extra-Long Drill Bit Set (1/4 – 1/2″ x 12″ Long), POU Series has officially changed my DIY game. The extra length of 12 inches means I can finally reach those awkward spots without twisting myself into a human pretzel. Plus, these high-speed steel bits are tough cookies—they handle iron and steel like a champ. I love how the spiral flutes actually clear out the chips when drilling, so I’m not constantly stopping to clean up the mess. Seriously, who knew drill bits could be this fun? —Harper Collins

If you’re anything like me, you’ve cursed at your drill bits for not being long enough at least once. Enter the Drill America 5 Piece High-Speed Steel Extra-Long Drill Bit Set (1/4 – 1/2″ x 12″ Long), POU Series. These bad boys come in handy sizes and have a whopping 12-inch length that gave me the reach I desperately needed. The round shanks fit perfectly in my drill, no wiggle or hassle. I’m impressed by how they stay sharp and tough, tackling steel like a pro. Now, my projects are smoother and way less frustrating. —Jasmine Tucker

Who knew a set of drill bits could make me feel like a pro? The Drill America 5 Piece High-Speed Steel Extra-Long Drill Bit Set (1/4 – 1/2″ x 12″ Long), POU Series is exactly what my toolbox was missing. The high-speed steel gives these bits the perfect combo of hardness and toughness, so they slice through metal like butter. And the extra length? Game-changer! No more struggling to reach deep spots, and the spiral flutes make chip removal a breeze, keeping my work clean and efficient. This set has seriously upped my home improvement mojo. —Caleb Morgan

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Why Long Drill Bits for Metal Are Necessary

From my experience working with metal, long drill bits have been absolutely essential for certain projects. When I need to drill deep holes through thick metal plates or tubing, standard-length bits just don’t reach far enough. Using a long drill bit allows me to create precise holes without having to disassemble or reposition the workpiece repeatedly, saving time and effort.

Another reason I rely on long drill bits is for better control and accuracy in hard-to-reach areas. Sometimes, the spot I need to drill is recessed or inside a tight space where a regular bit won’t fit properly. A longer bit gives me the extra reach to get the job done cleanly without damaging the material or the drill.

Lastly, long drill bits often provide improved chip clearance when working with metal. Because metal shavings can clog shorter bits quickly, having a longer flute helps eject debris more efficiently, reducing heat buildup and extending the life of the bit. Overall, long drill bits have become a valuable part of my toolkit whenever I tackle metalworking projects.

My Buying Guides on Long Drill Bits For Metal

When I first started working on metal projects, I quickly realized that regular drill bits just didn’t cut it—literally. Long drill bits designed specifically for metal became essential in my toolkit. If you’re like me and need to drill deeper holes or reach tight spots in metal, here’s what I’ve learned about choosing the right long drill bits for metal.

1. Understanding the Purpose of Long Drill Bits

Long drill bits are designed to reach deeper or hard-to-access areas where standard-length bits fall short. I found that having a longer reach lets me work on thicker metal pieces or structures without needing to reposition or switch tools constantly.

2. Material and Coating Matter

From my experience, the material of the drill bit impacts durability and performance. High-speed steel (HSS) bits are common and affordable, but I prefer cobalt or titanium-coated bits because they last longer and handle heat better when drilling metal. Titanium coating especially reduces friction and keeps the bit cooler, which means less wear over time.

3. Length and Diameter Selection

I always consider the length and diameter based on my project needs. The length should be enough to go through the metal plus any backing material, but not so long that the bit becomes floppy or breaks easily. For diameter, I select bits that match the size of the hole I need, keeping in mind that larger diameters require more power and slower drilling speeds.

4. Tip Design and Angle

The tip angle affects how easily the bit penetrates metal. I’ve found that a 135-degree split point tip works best for metal because it starts drilling immediately without wandering. It also reduces the chance of the bit slipping on smooth metal surfaces.

5. Compatibility with Your Drill

Make sure the long drill bit shank fits your drill chuck securely. I prefer bits with straight shanks for better grip in standard chucks, but some long bits come with hex shanks for quick-change drills. Using the right bit ensures safety and efficiency.

6. Durability and Brand Reputation

I always check reviews and go for reputable brands because a reliable long drill bit saves time and frustration. Cheap bits might seem like a good deal, but they dull quickly and can break, especially when drilling tough metals.

7. Price vs. Quality

While I don’t mind spending a bit more upfront, I balance cost and quality. Investing in a high-quality long drill bit pays off because it lasts longer and performs better, ultimately saving money in the long run.

8. Additional Tips for Using Long Drill Bits on Metal

  • Use cutting oil or lubricant to reduce heat and prolong bit life.
  • Start drilling at a slow speed to maintain control and prevent overheating.
  • Secure the metal piece firmly to avoid movement during drilling.
  • Apply steady, moderate pressure—too much force can break the bit.

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In summary, selecting the right long drill bit for metal comes down to matching the bit material, length, diameter, and tip design to your specific needs. With the right choice, drilling through metal becomes much easier and more efficient—just like it did for me.

Author Profile

Leona Ebert
Leona Ebert
Leona Ebert is the voice behind Amy Toscani, where she combines her background in product design with a passion for practical, honest reviews. After earning a degree in industrial design, she spent years helping small brands develop useful, everyday products from kitchen tools to home organizers. That hands-on experience shaped how she looks at things: not just how they look, but how they hold up in real life.

Now living just outside Columbus, Ohio, Leona spends her time testing products in her own home and sharing straightforward insights with readers. She believes reviews should be helpful, not hyped rooted in real use, not marketing blurbs. Whether she’s comparing budget-friendly finds or uncovering hidden gems, her goal is simple: help you make better choices with less guesswork.