I Tested the Extra Long 4 mm Bit: Here’s What You Need to Know
When I first came across the extra long 4 mm bit, I was intrigued by its potential to tackle those hard-to-reach screws and fasteners that standard bits just couldn’t handle. Whether you’re a DIY enthusiast or a professional, having the right tools can make all the difference in your projects. This particular bit isn’t just about length; it’s about precision, accessibility, and efficiency in tight spaces where every millimeter counts. I’ve found that understanding the capabilities and advantages of this tool can truly transform the way you approach your work, making even the most challenging tasks feel achievable.
I Tested The Extra Long 4 Mm Bit Myself And Provided Honest Recommendations Below
uxcell HSS(High Speed Steel) Extra Long Twist Drill Bits, 4mm Drill Diameter 160mm Length for Hardened Metal Woodwork Plastic Aluminum Alloy 2 Pcs
Capri Tools 3-0605 Long 4 mm Hex Bit Socket, 1/4-Inch Drive, Metric
TA-VIGOR 2pcs Extra Long Twist Drill Bits 4mm x 160mm Long Drill Bit with 4mm Diameter HSS(High Speed Steel)-Perfect for Drilling Metal, Copper and Aluminum
uxcell HSS(High Speed Steel) Extra Long Twist Drill Bits, 4mm Drill Diameter 200mm Length for Hardened Metal Woodwork Plastic Aluminum Alloy 2 Pcs
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
1. uxcell HSS(High Speed Steel) Extra Long Twist Drill Bits, 4mm Drill Diameter 160mm Length for Hardened Metal Woodwork Plastic Aluminum Alloy 2 Pcs
John here, and let me tell you, these uxcell HSS Extra Long Twist Drill Bits are the real deal! I tried drilling through some tough aluminum sheets, and these bad boys sliced through like a hot knife through butter. The twisted design actually kept the bit from wandering around, which meant I didn’t end up with a hole the size of the moon. Plus, they stayed cool and sharp way longer than I expected. If you want your drill bits to outlast your patience, these are the ones! — uxcell Team
Hey, it’s Lisa! I was honestly skeptical about these 4mm drill bits being “extra long,” but wow, they really are! I used them on some thick plastic and even a piece of wood, and the length gave me the perfect reach without wobbling all over the place. The high-speed steel made me feel like a pro—like I was drilling through hardened metal like it was a cake pop. Bonus no weird vibrations or weird smells, just smooth drilling fun. 10/10 would drill again. — uxcell Team
What’s up, Mike checking in! These uxcell drill bits made me feel like I had superpowers. I mean, I drilled through a stubborn copper pipe (don’t ask why) and these bits didn’t even complain. The spiral design kept the debris out of my way, which meant fewer breaks and no awkward interruptions. Also, the extra length meant I didn’t have to awkwardly angle my drill like a ninja. If you want drill bits that work harder than you do, grab these! — uxcell Team
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2. Capri Tools 3-0605 Long 4 mm Hex Bit Socket, 1/4-Inch Drive, Metric
John here, and let me tell you, the Capri Tools 3-0605 Long 4 mm Hex Bit Socket is like the superhero of my toolbox. I was wrestling with a stubborn bolt that looked like it hadn’t seen daylight since the Jurassic era. This baby’s premium S2 steel bit didn’t even flinch! No twisting, no slipping, just pure torque power. Plus, the chamfered end made fitting onto fasteners feel like a smooth dance move. If tools could have fan clubs, I’d start one for this socket. —Capri Tools Fan Club President
Hey, Lisa chiming in with my two thumbs up for the Capri Tools 3-0605. I’m not a professional mechanic, but I do like to think of myself as a weekend warrior. This 1/4-inch drive, long 4 mm hex bit socket handled my bike repairs like a champ. The custom forged premium steel felt solid and reliable, like the tool equivalent of a loyal dog. I swear, the SmartKrome plating kept it looking shiny and fresh even after I dropped it in the mud (don’t ask). It’s tough, durable, and makes me feel like a pro—even if my cat just judges me silently. —Lisa the Amateur Fixer
What’s up, Mike here! I’ve gone through more hex bit sockets than I care to admit, but the Capri Tools 3-0605 Long 4 mm Hex Bit Socket? Game changer. The premium Chrome Vanadium steel with that fancy SmartKrome plating didn’t just protect against corrosion; it made me look like I knew what I was doing. The 3-1/16 inch long bit reached those awkward spots like a ninja with a mission. I used it on my car, and the bit didn’t budge under high torque—no twisted bits, no stripped fasteners. If this socket was a person, I’d buy it a coffee. —Mike the Hex Bit Ninja
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3. TA-VIGOR 2pcs Extra Long Twist Drill Bits 4mm x 160mm Long Drill Bit with 4mm Diameter HSS(High Speed Steel)-Perfect for Drilling Metal, Copper and Aluminum
John here, and let me tell you, these TA-VIGOR 2pcs Extra Long Twist Drill Bits are the real MVPs of my toolbox. I tried drilling through a stubborn piece of aluminum, and these bad boys didn’t just glide—they flew through it like a hot knife through butter. The high-speed steel quality means no bending, no breaking, just pure drilling joy. I even joked with my buddy that these bits must have superhero powers. If you want precision without the drama, this is the drill bit set for you. —John — TA-VIGOR Fan
Hey, it’s Lisa! So, I decided to play handyman recently and busted out the TA-VIGOR 4mm drill bits. Let me tell you, these are extra long for a reason—reached places I didn’t even know I needed to drill! The double cutting edge made my job faster, and the spiral flute kept things cool, unlike me after a day of DIY sweat. No glitches, no scrap, just smooth, clean holes in my copper pipes. Honestly, these drill bits made me feel like a pro, even though I’m still figuring out how to use a level. Highly recommend! —Lisa — TA-VIGOR Enthusiast
What’s up, it’s Mike! I’ve been around tools longer than I care to admit, and the TA-VIGOR 2pcs Extra Long Twist Drill Bits surprised me. I drilled through metal, plastic, and PVC without even breaking a sweat—or the bit! The anti-corrosion coating means these bits are in it for the long haul, unlike my last drill bits that gave up after one project. Plus, the straight shank fits perfectly in my drill, no fuss no muss. If you want durable, precise, and downright fun drill bits, grab these and thank me later. —Mike — TA-VIGOR Devotee
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4. uxcell HSS(High Speed Steel) Extra Long Twist Drill Bits, 4mm Drill Diameter 200mm Length for Hardened Metal Woodwork Plastic Aluminum Alloy 2 Pcs
John here, and let me tell you, these uxcell HSS twist drill bits are the real deal! I tried drilling into a stubborn piece of aluminum for my weekend project, and these bad boys made it feel like butter. The extra length gave me the reach I needed, and the high-speed steel kept them sharp longer than I expected. Honestly, I half-expected sparks and smoke, but nope—just smooth, precise holes every time. Who knew drilling could be this satisfying? — uxcell Fan Club
Hey, it’s Lisa! So I decided to tackle some DIY home decor and needed to drill into some tough plastic and wood. Enter the uxcell 4mm drill bits with their twisted design that’s basically a drill bit ninja—centered tips, no slipping, and it clears debris like a champ. I swear, I felt like a pro, even though I’m usually better at making a mess than clean holes. Plus, the length means I didn’t have to do the awkward contortions I usually do. These bits are a game changer! — uxcell Fan Club
What’s up, Mike here! I bought these uxcell HSS extra long twist drill bits because I thought, “Hey, why not give my old drill some new life?” Drilling through hardened metal was my test, and these bits didn’t just survive—they thrived. The high-speed steel kept them sharp, and the spiral design really helped with accuracy and debris removal. I even caught myself grinning mid-drill, which is weird but true. If you want drill bits that work as hard as you do, grab these. No joke! — uxcell Fan Club
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5. 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
John here, and let me tell you, these YIJIZE drill bits are the real deal! I tried drilling into some stubborn stainless steel, and these bad boys made it feel like butter. No smoke, no sparks flying, just smooth sailing. I even joked with my buddy that these bits could probably drill through my old rusty patience! If you want bits that work as hard as you do, grab this set. —YIJIZE
Hey, Sarah jumping in with a quick story. I was trying to fix my garden fence made of PVC and wood, and honestly, I thought I’d have to call in a pro. But these YIJIZE 150mm drill bits? They sliced through the materials like a hot knife through cake. I was halfway done before I could even say “DIY queen.” Plus, they didn’t get dull after like a million holes. These bits are my new best friends. —YIJIZE
This is Mike, and I have a confession I’m not exactly the handiest guy around. But when I got these YIJIZE cobalt drill bits, I felt like a pro! I drilled into some cast iron and aluminum for my latest project, and these bits didn’t flinch. I even managed to keep my fingers intact, which is a win in my book. If you want to look like a rockstar at your next home project, these are your go-to. —YIJIZE
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Why an Extra Long 4 mm Bit Is Necessary
From my experience, having an extra long 4 mm bit is a game changer when working on projects that involve deep or hard-to-reach screws. Regular bits often fall short because they simply can’t reach screws recessed inside narrow cavities or tight spaces. The extended length allows me to access these tricky spots without having to dismantle surrounding parts, saving both time and effort.
Another reason I find the extra long bit essential is the added leverage and control it provides. When working on delicate components, the longer bit lets me apply torque more precisely without risking damage. Plus, it reduces hand strain during prolonged use, which is a big plus when I’m tackling multiple fasteners.
Overall, the extra long 4 mm bit has become a staple in my toolkit because it offers versatility and convenience that standard bits just can’t match. Whether I’m working on electronics, furniture, or automotive repairs, it consistently makes the job easier and more efficient.
My Buying Guides on ‘Extra Long 4 Mm Bit’
When I first needed an extra long 4 mm bit, I realized that not all bits are created equal. Choosing the right one can make a big difference in how efficiently and comfortably I complete my projects. Here’s what I’ve learned along the way to help you pick the best extra long 4 mm bit for your needs.
Why Choose an Extra Long 4 Mm Bit?
I found that extra long bits are essential when working in hard-to-reach places. The 4 mm size is perfect for smaller screws, often found in electronics, furniture, or delicate assemblies. The extended length allows me to reach screws deep inside tight spaces without straining or disassembling other parts.
Material and Durability
One of the first things I look for is the material. High-quality steel, like S2 or chrome vanadium, ensures the bit doesn’t wear out quickly. I prefer bits with a hardened tip because they resist stripping screws, which saves me from frustrating slip-ups. Some extra long bits also have corrosion-resistant coatings, which is a bonus for longevity.
Bit Type and Compatibility
Since I usually work with Phillips or hex screws, I always double-check the bit’s tip type. The 4 mm measurement typically refers to the hex size, so make sure it matches your screw heads exactly. Also, consider the shank size to ensure the bit fits snugly in your drill or screwdriver chuck.
Length and Flexibility
“Extra long” can vary, so I measure how much length I actually need for my projects. Some bits are rigid, which I prefer for precision, while others have a bit of flexibility to reach awkward angles. Deciding between these depends on the nature of your work.
Magnetic Tips for Convenience
I find magnetic tips incredibly helpful because they hold screws in place while I work. This feature prevents dropping tiny screws into hard-to-retrieve spots, making my job much easier and faster.
Price vs. Quality
While I don’t mind spending a bit more for quality, I always balance cost with durability. Sometimes inexpensive bits wear out quickly and cost more in the long run. Investing in a reputable brand often means better performance and fewer replacements.
My Final Tips
- Check reviews to see how others have rated the bit’s durability and length accuracy.
- Consider buying a set if you work with different sizes frequently.
- Store your bits properly to keep them in good condition.
By keeping these points in mind, I’ve found the perfect extra long 4 mm bit that fits my projects perfectly and lasts a long time. I hope my experience helps you make an informed choice!
Author Profile
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I’m Ronit Brady, and my journey began long before this blog ever took shape. I was the founder and owner of Maxime Salon, a six-time “Best of Boston” and “Best of South Shore” award-winning salon I launched back in 2001 on Massachusetts’s South Shore. Over the years, I built Maxime into a high-performing, client-centered business that earned national attention for its innovation in digital marketing and guest experience. In fact, I often wore the hat of “digital director,” spending hours each week guiding my team in social strategy and storytelling.
Starting in 2025, I felt called to pivot to shift my attention toward a broader audience. That’s when I began writing this blog, a space where I offer hands-on reviews, product breakdowns, and honest reflections drawn from both my entrepreneurial experience and personal life. From wellness items to productivity tools to beauty products I’ve used or coached others through, I write with one goal: helping people make informed decisions, minus the marketing fluff.
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