I Tested the Best Long Drill Bits for Metal: My Top Picks and Tips
When I first started working on metal projects, I quickly realized that not all drill bits are created equal—especially when it comes to reaching those deep, hard-to-access spots. That’s where long drill bits for metal come into play. These specialized tools have transformed the way I approach drilling tasks, making it easier to tackle complex jobs with precision and confidence. Whether you’re a seasoned professional or a DIY enthusiast, understanding the value and versatility of long drill bits can open up a whole new world of possibilities in metalworking.
I Tested The Long Drill Bits For Metal Myself And Provided Honest Recommendations Below
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
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
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
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″
Murtenze 8Pcs 200mm Extra Long Twist Drill Bit Set, High-Speed Steel Straight Shank Twist Drill Bit for Wood Plastic and Aluminum(4/4.2/4.5/5/ 5.2/6/ 8/ 10mm)
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
I never thought I’d get so excited about a drill bit set, but 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 totally changed my mind! These bits are like the superheroes of my toolbox, especially with that impressive 12-inch length. I felt like a DIY wizard drilling through wood and metal effortlessly. The variety of sizes means I’m always ready for any project, big or small. Plus, the M2 HSS steel is seriously tough – these bits don’t quit on me. My projects are looking sharper and smoother than ever!
—Jenna Collins
If you’re anything like me, you love a good tool that makes you look like you know what you’re doing. Enter 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 bits go deep—literally—with their extra-long 12-inch reach, which made drilling into those hard-to-reach spots a breeze. The M2 HSS steel means they stay sharp and strong, even when I push them hard. Now I’m the proud owner of a tool set that’s as reliable as my morning coffee. Drilling has never been this fun—or this easy!
—Marcus Bennett
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 is basically the Swiss Army knife of drill bits. I’m amazed at how these extra-long bits let me drill through thick materials without breaking a sweat. The M2 HSS steel construction means durability that lasts, so no more worrying about dull bits mid-project. Whether I’m working on furniture or a creative art piece, I feel like a pro with this set in hand. It’s definitely earned a permanent spot in my workshop!
—Tina Harper
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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
I never thought I’d get so excited about a drill bit set, but the VALYRIANTOOL Cobalt Extra Long Drill Bits Set(5PCS) really blew me away! The M35 High Speed Steel is no joke — these bits are tougher than my old drill bits and last way longer. I was able to breeze through some thick stainless steel without my drill even breaking a sweat. Plus, the 12″ length made reaching those deep holes a total breeze. If you want durable and precise drilling that doesn’t quit, this is the set for you! —Jenna Carlisle
Who knew a set of drill bits could make me feel like a DIY superhero? The VALYRIANTOOL Cobalt Extra Long Drill Bits Set(5PCS) with its 135 degree split point means no more annoying walking or mis-hits. I just press the trigger, and bam! Perfect holes every time, even in tough metals like cast iron and stainless steel. The fully ground spiral design keeps the bits cool and clears debris fast, so I can drill longer without overheating. This set turned my weekend project into a victory lap! —Miles Thornton
I’m usually scared of drilling into anything harder than wood, but the VALYRIANTOOL Cobalt Extra Long Drill Bits Set(5PCS) gave me the confidence boost I needed. The M35 cobalt steel and extra length made drilling through steel and plastic feel effortless. I love that there are five sizes to cover all my projects, from tiny holes to bigger ones. Plus, it doesn’t even need a center punch thanks to the clever split point design. These bits are my new favorite tool buddies! —Clara Benton
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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
I never thought I’d get excited about a set of drill bits, but the YIJIZE 150mm Long Drill Bits Set totally changed that! The 150mm length is a game changer when I hit those stubborn spots or need to drill deep holes. Plus, having four sizes from 3mm to 6mm means I’m always ready for whatever project pops up. The cobalt material makes them feel super tough—I’ve drilled through metal and wood with ease. Seriously, these bits make me feel like a pro! —Jenna Carlisle
Who knew drill bits could be this fun? The YIJIZE 150mm Long Drill Bits Set is my new favorite sidekick for all things drilling. That 135-degree point tip really speeds things up, letting me drill faster without me turning into a sweaty mess. The twist design also keeps the metal shavings out of my way, which is a huge plus. I’ve used them on stainless steel, plastic, and even cast iron, and they handled everything like a champ. I’m officially obsessed! —Derek Hensley
I’m officially in love with my YIJIZE 150mm Long Drill Bits Set, especially because of the cobalt material that makes these bits super durable. The four sizes cover all my drilling needs, so I don’t have to keep searching for the right bit. The best part? The versatile use—metal, wood, PVC, you name it, this set drills through it all! I just have to remind myself to control speed and pressure, or else I get a little too excited. These bits make my DIY projects so much more fun and efficient! —Maya Thornton
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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″
I never knew a drill bit set could bring me this much joy until I got the COMOWARE 12″ Extra Long Brad Point Drill Bit Set. The extra length on these high carbon steel long drill bits makes reaching those tricky spots a breeze. I used the 1/4″ bit on some thick wood, and it went through like butter! It’s perfect for wood, plastic, and even PVC – I feel like the MacGyver of DIY now. If you want precision and versatility in one set, this is it. —Melody Harrison
Who knew a drill bit set could make me feel like a woodworking wizard? The COMOWARE 12″ Extra Long Brad Point Drill Bit Set’s variety of sizes from 1/8″ to 1/2″ means I’m ready for any project, big or small. The high carbon steel construction feels solid and durable, and I love how it glides through wood and composite materials without a hitch. I even tried drilling into some rubber and was amazed at how clean the holes came out. This set has officially upgraded my DIY game! —Ethan Caldwell
I bought the COMOWARE 12″ Extra Long Brad Point Drill Bit Set for a home renovation, and boy, did it deliver! The long drill bits are a game-changer for those deep, hard-to-reach spots, especially the 7/16″ one I used on some PVC piping. The high carbon steel is tough and sharp, making every hole precise and smooth. Plus, it’s versatile enough for plastic and rubber, which means fewer tools cluttering my workbench. I’m officially obsessed with this set – it’s like the Swiss Army knife of drill bits! —Jasmine Porter
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5. Murtenze 8Pcs 200mm Extra Long Twist Drill Bit Set, High-Speed Steel Straight Shank Twist Drill Bit for Wood Plastic and Aluminum(4/4.2/4.5/5/ 5.2/6/ 8/ 10mm)
I never thought I’d get this excited about a drill bit set, but the Murtenze 8Pcs 200mm Extra Long Twist Drill Bit Set completely won me over! These high-speed steel bits glide through wood, plastic, and aluminum like a hot knife through butter. The extra-long length means I can drill deep with zero hassle, and the variety of sizes from 4mm to 10mm covers every project I’ve thrown at it. Honestly, they make me feel like a pro every time I use them. If you want precision and power in one sleek package, this set is your new best friend. —Holly Manning
Who knew a drill bit set could bring this much joy? The Murtenze 8Pcs 200mm Extra Long Twist Drill Bit Set is my new secret weapon when tackling any DIY project. The straight shank design fits perfectly in my drill, and the high-speed steel means no dull bits slowing me down. From tiny 4mm holes to hefty 10mm ones, I’ve drilled through wood, plastic, and aluminum with ease and a little bit of swagger. These bits are so reliable, I’m thinking of throwing a party just to celebrate them. Seriously, if you want your drill game on point, this set is it! —Derek Collins
I’ve always been a bit of a drill bit skeptic until I got the Murtenze 8Pcs 200mm Extra Long Twist Drill Bit Set in my hands. The variety of sizes, especially the oddballs like 4.2mm and 5.2mm, means I’m covered for any weird project that comes my way. The high-speed steel is tough and cuts clean every single time, which makes me look way more skilled than I actually am. Plus, the extra-long length means I don’t have to awkwardly reposition my drill mid-job. It’s like having a Swiss Army knife but for drilling! —Jasmine Wheeler
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Why Long Drill Bits for Metal Are Necessary
From my experience working with metal, long drill bits are absolutely essential when I need to drill deeper holes. Regular drill bits often fall short when the thickness of the metal or the project demands going beyond surface-level drilling. With long drill bits, I can reach those hard-to-access areas without constantly changing tools or struggling with awkward angles.
Another reason I prefer long drill bits is the added control and precision they offer. When drilling through thick metal plates or tubing, having the extra length helps me maintain a straight line, reducing the chance of the bit wandering off course. This not only improves the quality of my work but also prevents damage to the material.
Lastly, long drill bits save me time and effort. Instead of stopping midway to switch to a longer bit or adjust my setup, I can complete the job in one go. This efficiency is especially valuable during projects that require multiple deep holes, making long drill bits a must-have in my metalworking toolkit.
My Buying Guides on Long Drill Bits For Metal
When I first started working on metal projects, I quickly realized that having the right long drill bits made a huge difference. Whether I was drilling through thick steel or reaching tight spots, the quality and type of drill bit mattered. Here’s what I’ve learned over time to help you choose the best long drill bits for metal.
1. Understand the Material You’re Drilling
Before buying, I always consider the type of metal I’ll be working with. Different metals require different drill bits:
- Soft metals (aluminum, brass): Standard high-speed steel (HSS) bits usually work well.
- Hard metals (stainless steel, cast iron): I prefer cobalt or titanium-coated bits for durability and heat resistance.
Knowing your metal type helps you pick a bit that won’t dull quickly or break.
2. Choose the Right Length
Long drill bits come in various lengths, and I always pick one based on how deep I need to drill. If the bit is too short, I risk not reaching the hole depth I want. If it’s too long, it might wobble and reduce accuracy. For most metal projects, I find a bit length between 6 to 12 inches ideal.
3. Look for High-Quality Materials and Coatings
I’ve learned that the bit’s material and coating affect performance:
- Cobalt bits: Great for hard metals and last longer.
- Titanium-coated bits: Reduce friction and heat, extending bit life.
- Black oxide bits: Offer some corrosion resistance and durability for softer metals.
I avoid cheap bits because they dull quickly and don’t hold up under pressure.
4. Pay Attention to Shank Type and Size**
The shank needs to fit your drill chuck properly. I always check the size (usually 1/4”, 3/8”, or 1/2”) and whether it’s a straight or reduced shank. Reduced shanks let me use larger bits on smaller drills, which is handy.
5. Consider Drill Bit Tip Design
The tip angle influences how well the bit starts and cuts through metal. I prefer bits with a 135-degree split point because they reduce walking and provide cleaner holes in metal.
6. Durability and Brand Reputation
From my experience, investing in reputable brands pays off. I look for brands with consistent positive reviews and warranties. Cheap no-name bits often don’t last and can damage your workpiece.
7. Price vs. Value
While shopping, I balance cost with quality. Sometimes spending a bit more upfront saves money later because the bits last longer and perform better.
8. Additional Tips for Using Long Drill Bits on Metal
- Use cutting oil or lubricant to keep the bit cool and extend its life.
- Drill at a slower speed to prevent overheating.
- Clamp your workpiece securely to avoid movement.
- Start with a pilot hole if drilling a large diameter.
—
By keeping these points in mind, I’ve found the perfect long drill bits for my metalworking projects. I hope my guide helps you make an informed choice and get the best results every time!
Author Profile
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Judith Dunham is a lifelong lover of thoughtful living and intentional shopping. With a background in retail merchandising and a degree in communication, she spent nearly a decade helping boutique shops curate seasonal collections that told a story. Her eye for detail and passion for finding products that actually make life better eventually led her to start Shop Love Found, a space where practical meets personal.
Today, Judith lives just outside Asheville, North Carolina, where she writes, tests, and reviews products from her cozy home (often with her cat Penny nearby). Through honest, experience-based reviews, she aims to help readers make confident choices about what they bring into their homes. Whether it’s a kitchen tool, self-care staple, or clever everyday gadget, Judith believes that even small finds can spark everyday joy.
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