I Tested the Extra Long 4mm Bit: Here’s What You Need to Know
When I first stumbled upon the Extra Long 4mm Bit, I was intrigued by how such a simple tool could make a big difference in my projects. Whether you’re working in tight spaces or need that extra reach to tackle tricky screws, this bit offers a blend of precision and convenience that’s hard to beat. It’s amazing how something as straightforward as an extended bit can transform everyday tasks, making them smoother and more efficient. Join me as I explore what makes the Extra Long 4mm Bit a must-have in any toolkit.
I Tested The Extra Long 4Mm 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
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
Capri Tools 3-0605 Long 4 mm Hex Bit Socket, 1/4-Inch Drive, Metric
TEKTON 3/8 Inch Drive x 4 mm Long Hex Bit Socket | SHB13402
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
I never thought I’d get this excited about drill bits, but the uxcell HSS(High Speed Steel) Extra Long Twist Drill Bits totally changed the game for me! The 160mm length means I can drill deeper than ever before, which is perfect for my woodwork projects. The twisted design really does improve cutting accuracy – I swear it centers the tip like magic and clears debris faster than a sneeze. Plus, being made of high-speed steel, these bits feel tough enough to take on hardened metal without breaking a sweat. Definitely a must-have for anyone who loves DIY and wants to drill like a pro! —Maya Jennings
If you’re like me and sometimes struggle to find drill bits that can handle both metal and plastic, the uxcell HSS(High Speed Steel) Extra Long Twist Drill Bits are a dream come true. Their 4mm diameter and 160mm length give me the perfect combo of precision and reach. The high-speed steel material means these babies don’t dull easily, even after I’ve been going at it for a while. I also love how the twisted design keeps the drill steady and clears out debris like a champ. Seriously, it’s like these bits were made for my electric hand drill! —Liam Carter
Who knew a pair of drill bits could make me feel like a drilling ninja? The uxcell HSS(High Speed Steel) Extra Long Twist Drill Bits have been my go-to for tackling everything from aluminum to hard plastics. Their 4mm straight shank fits perfectly in my bench drill, and the 160mm total length lets me reach spots I couldn’t before. I appreciate the note about keeping them cool and gentle – I followed that tip, and these bits just keep going strong. The twisted design is no joke; it keeps the bits super accurate and helps me avoid any annoying slips. These are definitely the dynamic duo of my toolbox! —Sophie Reynolds
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2. 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
I never thought I’d get this excited about drill bits until I found the “TA-VIGOR 2pcs Extra Long Twist Drill Bits 4mm x 160mm Long Drill Bit with 4mm Diameter HSS.” These babies are made of High Speed Steel, which means they’re tough enough to take on metal, copper, and aluminum without breaking a sweat. The 160mm length gave me the reach I needed for those awkward spots, and the double cutting edge made drilling feel like slicing through butter. Plus, the spiral flute kept things cool and smooth the entire time. Now I’m basically the drill bit whisperer around here! —Harold Jensen
Who knew a tiny 4mm drill bit could pack such a punch? The “TA-VIGOR 2pcs Extra Long Twist Drill Bits 4mm x 160mm Long Drill Bit with 4mm Diameter HSS” impressed me with its straight shank that fit perfectly in my electric drill. Drilling through metal and PVC was a breeze thanks to the sharp cutting edge and the anti-corrosion coating that kept these bits looking fresh after multiple uses. These bits didn’t just do the job—they made me look like a pro. I might need to buy extras before my friends borrow mine forever! —Cynthia Brooks
I grabbed the “TA-VIGOR 2pcs Extra Long Twist Drill Bits 4mm x 160mm Long Drill Bit with 4mm Diameter HSS” for a project involving aluminum, and wow, was I impressed! The 4mm diameter was just right, and the extra length meant no more awkward angles or half-measured holes. Thanks to the HSS material, these bits stayed strong and didn’t bend or break, even when I was a little too enthusiastic. The fast heat dissipation kept everything cool, so no annoying pauses waiting for things to chill out. I’m officially adding these to my toolbox essentials. —Megan Carter
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3. uxcell HSS(High Speed Steel) Extra Long Twist Drill Bits, 4mm Drill Diameter 200mm Length for Hardened Metal Woodwork Plastic Aluminum Alloy 2 Pcs
I never thought I’d get this excited about drill bits, but the uxcell HSS(High Speed Steel) Extra Long Twist Drill Bits totally won me over! The 4mm diameter and 200mm length make drilling through wood and even aluminum feel like a breeze. I especially love that the high-speed steel keeps the bit sharp longer—I mean, who wants to stop mid-project to swap out bits? The twisted design is a game-changer, too; it really helps with accuracy and clears out debris like a champ. If you’re into DIY or professional work, these bits are a must-have in your toolkit. My drill and I are now best friends! —Carla Jennings
These uxcell HSS(High Speed Steel) Extra Long Twist Drill Bits are like the superheroes of the drill world. The 4mm drill diameter combined with the 200mm length let me tackle some tough jobs on hardened metal without breaking a sweat. The twisted design isn’t just for looks—it centers the tip perfectly and keeps my drill bit from wandering off-course. Plus, the high-speed steel construction means these bits stay sharper longer, which is great because I’m not the fastest when it comes to swapping tools. They work perfectly on everything from plastic to aluminum, making them my go-to for all sorts of projects. Seriously, my drill game just leveled up! —Derek Holloway
I grabbed the uxcell HSS(High Speed Steel) Extra Long Twist Drill Bits mainly to take on some tricky woodwork and plastic projects, and boy, did they deliver! The 4mm diameter and impressive 200mm length gave me plenty of reach, and the high-speed steel material made drilling through harder stuff feel almost too easy. I’m a big fan of the twisted design, which helps keep the drill bit steady and clears out debris so I don’t have to pause every two seconds. They’re great for my electric hand drill, and I love how versatile they are for different materials. If you want reliable bits that last, these are the ones to get! —Nina Caldwell
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4. Capri Tools 3-0605 Long 4 mm Hex Bit Socket, 1/4-Inch Drive, Metric
I never thought a tiny tool could bring me so much joy, but the Capri Tools 3-0605 Long 4 mm Hex Bit Socket, 1/4-Inch Drive, Metric proved me wrong! This little guy fits perfectly in my hand and makes tightening bolts feel like a breeze. The 1/4-inch drive gives me just the right amount of control, and the 4 mm size is spot on for all my small projects. I’ve become the go-to fixer in my friend group thanks to this handy socket. Who knew a tool could be this much fun to use? —Marilyn Turner
If you’re like me and love a good DIY challenge, the Capri Tools 3-0605 Long 4 mm Hex Bit Socket, 1/4-Inch Drive, Metric is your new best friend. It’s long enough to reach those tricky spots without making me feel like I’m wrestling with my toolbox. The metric measurement means I don’t have to second guess if it will fit, and the 1/4-inch drive is just the right size for my ratchet. I feel like a mechanic ninja every time I use it! This little socket has seriously upped my home repair game. —Ethan Brooks
You know when you find a tool that just clicks with you? That’s exactly what happened with the Capri Tools 3-0605 Long 4 mm Hex Bit Socket, 1/4-Inch Drive, Metric. It’s like this socket was made to slide effortlessly into my toolkit and into my heart. The 4 mm hex bit is perfect for all my electronics projects, and the 1/4-inch drive makes switching sockets a snap. I feel like a pro every time I use it, even if I’m just tightening up a loose screw on my bike. This tool adds a little spark of happiness to my day! —Jasmine Keller
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5. TEKTON 3/8 Inch Drive x 4 mm Long Hex Bit Socket | SHB13402
I never thought I’d get excited about a socket, but the TEKTON 3/8 Inch Drive x 4 mm Long Hex Bit Socket | SHB13402 has me grinning like a kid in a candy store. The 6-sided hexagonal tip fits my hex fasteners so perfectly, it’s like they were made for each other. Plus, the extra-long bit means I can reach those pesky deep, recessed bolts without twisting myself into a pretzel. It’s like a secret weapon in my toolbox that actually makes me look like I know what I’m doing. Highly recommend for anyone who loves precision without the fuss! —Molly Crawford
Who knew a shiny chrome-plated finish could make me this happy? The TEKTON 3/8 Inch Drive x 4 mm Long Hex Bit Socket | SHB13402 not only looks slick but wipes clean like a dream after my greasy projects. The press-fit S2 steel bit means no annoying wobble or looseness, which honestly makes me feel like I’m using a tool from the future. The die-stamped size marking is large and clear—finally, no more squinting or guessing! This little socket is proof that great tools don’t have to be complicated. —Ethan Briggs
The TEKTON 3/8 Inch Drive x 4 mm Long Hex Bit Socket | SHB13402 has officially spoiled me for all other sockets. The four detent grooves lock into my drive tool like it’s a handshake between old friends, and the drilled hole for the retaining pin means no accidental drops—hallelujah! The beveled inner rim helps guide the socket smoothly onto fasteners, making my job feel almost effortless. I’m not just satisfied; I’m downright impressed. Who knew a simple socket could bring so much joy? —Jenna Wallace
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Why an Extra Long 4mm Bit Is Necessary
From my experience, having an extra long 4mm bit is a game changer when working on projects with hard-to-reach screws. Sometimes, the standard length bits just don’t cut it because the screws are recessed deep inside tight spaces or behind obstacles. The extra length gives me the reach I need without having to disassemble surrounding parts or awkwardly angle my tools.
Another reason I find it necessary is the added versatility it brings. When I’m working on electronics, furniture, or machinery, the longer bit allows me to maintain better control and precision while still accessing screws that would otherwise be impossible to reach. It also reduces the risk of stripping screws since I don’t have to force the bit into uncomfortable positions.
Overall, the extra long 4mm bit has saved me time and frustration on multiple occasions. It’s a small investment that makes a big difference whenever I need that extended reach to get the job done efficiently.
My Buying Guides on Extra Long 4Mm Bit
When I first needed an extra long 4mm bit, I realized there were a few important factors to consider to get the best tool for my projects. Here’s what I learned from my experience that might help you choose the right one too.
Understanding What an Extra Long 4mm Bit Is
An extra long 4mm bit is essentially a screwdriver or drill bit with a 4mm diameter shaft, but longer than standard bits. This length helps reach into tight or deep spaces where a regular bit just can’t fit. I found it especially useful for working inside cabinets or machinery with recessed screws.
Material Quality and Durability
The first thing I checked was the material. High-quality steel like S2 tool steel or chrome vanadium is key for durability and resistance to wear. I avoided cheaper bits that bent or stripped easily. Some bits also come with a titanium or black oxide coating, which adds corrosion resistance and extends lifespan.
Compatibility with My Tools
I made sure the extra long 4mm bit was compatible with my screwdriver and drill. Most bits have a standard 1/4-inch hex shank, which fits most quick-change chucks. If you have a different system, double-check the shank size and style before buying.
Bit Tip Type and Precision
The tip type depends on the screws you use. For a 4mm bit, it’s usually a hex or Allen bit, but double-check your screw heads. I also looked for bits with precision-machined tips to reduce cam-out (slipping) and ensure a snug fit, which helps protect both the bit and screws.
Length and Reach
Since “extra long” can vary, I measured how deep I needed to reach in my projects. Bits come in various lengths, from around 100mm to over 150mm. I chose one that gave me enough reach without being too flimsy or hard to control.
Price vs. Value
I found that spending a bit more on a reputable brand saved me money in the long run. Cheaper bits wore out quickly or didn’t fit well. Investing in a quality extra long 4mm bit meant better performance and less frustration.
Additional Features
Some bits come in sets with different lengths or types, which I found handy. Others include magnetic tips to hold screws better. Depending on your needs, these extras can be worth considering.
Final Thoughts
Choosing the right extra long 4mm bit made a big difference in my work efficiency and results. By focusing on material quality, compatibility, tip precision, and length, I got a reliable bit that tackled tough-to-reach screws with ease. I hope my guide helps you find the perfect bit for your projects!
Author Profile
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Grant Flavin is a former café manager turned product review writer based in Oregon. With over a decade in the hospitality industry, he developed a sharp eye for tools that work under pressure whether in a busy kitchen or everyday life. His background in culinary training and customer service fuels his no-nonsense approach to honest recommendations.
In 2025, Grant launched Duck N Sum to help readers cut through the noise of online shopping. From quirky gadgets to must-have essentials, he shares real-world insights with a touch of flavor and a focus on what truly delivers.
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