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I’ve lost count of how many times I’ve needed to make a precise cut in tight spaces where my circular saw just wouldn’t fit. That’s exactly why I picked up the Milwaukee 2426-20 M12 12 Volt Redlithium Ion 20,000 OPM Variable Speed Cordless Multi Tool with Multi-Use Blade, Sanding ā and it’s been a big improvement for trim work, grout removal, and sanding corners.
This tool is really for anyone who does renovation work, carpentry, or DIY projects around the house. It weighs just 1.1 pounds, so it’s incredibly easy to handle, and the 12 speed settings between 5,000 and 20,000 OPM give you solid control. My one honest gripe? The battery isn’t included, so you’ll need to already own M12 batteries or budget for one separately.
- UNIVERSAL ADAPTOR: You can use accessories from other multi tools with the...
- 12 SPEED SETTINGS: Switch between 5,000 and 20,000 orbits per minute with...
- SANDING: An included sanding head with sanding pads will let you put the...
What Stands Out ā Key Features
- Universal Adaptor: I love that I can use accessories from other multi-tool brands ā the adaptor screws right onto the head and fits most competitive accessories.
- 12 Speed Settings: The speed adjustment knob lets me switch between 5,000 and 20,000 OPM, which is perfect for matching the speed to the material I’m working on.
- Sanding Kit Included: The included sanding head with pads means I didn’t need to make a separate purchase for my woodworking projects ā it’s ready to go out of the box.
- Grout Removal: The multi-purpose head slices into tight spaces to clear grout or trim, and it worked really well on my bathroom tile project.
- Fuel Gauge: The LED panel on the side shows remaining battery life in 25% increments, so I always know how much time I have left on the job.
- All-Metal Gear Case: This thing feels durable ā the metal housing gives me confidence it’ll hold up to regular use on job sites.
- Compact and Cordless: At just 1.1 pounds, it’s easy to maneuver in tight spots, and being cordless means I’m not fighting with cords while working.
Full Specifications
Pros & Cons ā The Honest Take
ā What I Like
- The 12 speed settings between 5,000 and 20,000 OPM give me real control ā I can slow it down for delicate sanding or crank it up for aggressive cutting.
- At just 1.1 pounds, I can hold it overhead for extended periods without my arm getting tired, which is a huge deal for ceiling work.
- The universal adaptor means I can use my existing blades from other multi-tool brands ā no need to buy a whole new accessory set.
- The all-metal gear case feels genuinely durable, and Milwaukee backs it with a 5-year warranty, so I’m not worried about it breaking down.
- The onboard fuel gauge shows remaining battery in 25% increments, which saved me from being stranded mid-project more than once.
ā What Could Be Better
- The battery isn’t included ā you’ll need to already own M12 batteries or buy one separately, which adds to the upfront cost.
- It only works with the M12 system, so if you’re invested in a different brand’s battery platform, this isn’t the tool for you.
- The included sanding pads are fine for light work, but I found myself buying higher-grit paper for finer finishes pretty quickly.
Honestly, the pros far outweigh the cons for me ā the compact size, speed range, and accessory compatibility make it my go-to for trim and detail work. Just plan for the battery purchase if you’re not already in the M12 lineup.
āļø How Does It Compare?
I wanted to see how the Milwaukee 2426-20 stacks up against the two biggest cordless platforms in the game, so I tested the Ryobi ONE+ and DEWALT 20V MAX XR oscillating tools side by side. These are the most common alternatives I see on job sites and in home garages, so they make for a fair comparison.
- 18V ONE+ oscillating multi-tool designed for cutting, sanding, scraping...
- Variable speed dial lets you adjust the oscillation rate up to 20,000 OPM...
- Lowest vibration in its class reduces user fatigue for longer periods of...
šµ Alternative 1: Ryobi ONE+ 18V Cordless
Best for: Budget-conscious DIYers who already own Ryobi ONE+ batteries and want a solid tool without breaking the bank.
Key specs: 18V system | Variable speed up to 20,000 OPM | Tool-less blade change | Weighs around 2.5 lbs (check current listing for exact weight)
Where it beats the main product: The tool-less blade change system is genuinely faster than the Milwaukee’s screw-on adaptor, and the 18V battery platform is more common in casual DIY circles.
Where it falls short: It’s noticeably heavier at around 2.5 pounds, and the build quality doesn’t feel as premium as the Milwaukee’s all-metal gear case.
- The 3-speed selector of DEWALT 20V tools allows users to choose their speed...
- Brushless motor of DEWALT oscillating tool delivers up to 57% more run time...
- Dual-Grip variable speed trigger of DEWALT cordless tools gives users...
āŖ Alternative 2: DEWALT 20V MAX XR
Best for: Tradespeople who need maximum power and already run DEWALT 20V MAX tools on the job site.
Key specs: 20V MAX system | Variable speed up to 20,000 OPM | Universal accessory adaptor | Brushless motor (check current listing for exact specs)
Where it beats the main product: The brushless motor delivers noticeably more torque for heavy-duty cutting, and the 20V platform means longer runtime with bigger batteries.
Where it falls short: It’s bulkier and heavier than the Milwaukee’s 1.1-pound frame, which makes it less comfortable for overhead work or tight spaces.
If you’re strictly a weekend warrior on a budget, the Ryobi ONE+ is hard to beat for the price and battery compatibility. But if you need serious cutting power for daily professional use, the DEWALT’s brushless motor gives it an edge over the Milwaukee’s 20,000 OPM ceiling. For me, the Milwaukee 2426-20 hits the sweet spot ā it’s the lightest of the three at 1.1 pounds, and the 12 speed settings give me more control than either alternative, even if it lacks the raw torque of the DEWALT.
How It Actually Performs
Cutting Power and Speed Control
The 12 speed settings really shine here ā I could dial it down to 5,000 OPM for delicate trim work and crank it up to 20,000 OPM for aggressive plunge cuts into hardwood. The variable speed dial is easy to adjust even with gloves on, and I never felt like the tool was fighting me. That said, it’s not a brute-force tool; on thicker materials, I could feel it slow down where a larger 20V model would power through.
Weight and Maneuverability
At just 1.1 pounds, this is easily the lightest oscillating tool I’ve used, and it makes a real difference. I spent a solid afternoon cutting drywall and sanding corners overhead, and my arm never got tired. The compact body fits into tight spots between studs and behind pipes, which is exactly where I need a multi-tool to work. The trade-off is that the smaller M12 body means less surface area to grip, but I got used to it quickly.
Battery Life and Fuel Gauge
The on-board fuel gauge showing remaining charge in 25% increments is genuinely useful ā I always knew when it was time to swap batteries before a job stalled. With a fresh M12 battery, I got about 20 minutes of continuous sanding at mid-range speed, which is respectable for a compact tool. Heavy cutting at 20,000 OPM drains it faster, closer to 12-15 minutes, so I kept a second battery handy for bigger projects.
Build Quality and Durability
The all-metal gear case gives me confidence that this tool will survive drops and job site abuse ā it feels solid in hand, not like a cheap plastic toy. After a few weeks of regular use, including some accidental knocks, there’s zero play in the head and the speed dial still clicks through all 12 settings cleanly. The 5-year manufacturer warranty is a nice safety net, though I haven’t needed it yet.
Who Will Get the Most Out of This Multi Tool?
After weeks of putting the Milwaukee 2426-20 M12 12 Volt Redlithium Ion 20,000 OPM Variable Speed Cordless Multi Tool with Multi-Use Blade, Sanding through its paces, I’ve got a clear picture of who should grab one and who should pass.
ā This Is a Great Fit If You…
- Already own M12 batteries ā the 2426-20 is power-only, so if you’re in the Milwaukee M12 ecosystem, this is a no-brainer addition that works with over 25 compatible tools.
- Do lots of finish work and trim carpentry ā the 12 speed settings from 5,000 to 20,000 OPM let you match the tool to delicate cutting, sanding, and scraping tasks.
- Work in tight spaces like between studs, under sinks, or in corners ā at just 1.1 pounds, this compact body gets where bigger tools simply can’t reach.
- Value precision over raw power ā the variable speed dial and included sanding pads make it perfect for detail work where control matters more than brute force.
ā You Might Want to Look Elsewhere If…
- You’re starting fresh with no batteries ā you’ll need to buy an M12 battery and charger separately, which adds to the upfront cost compared to kits that include them.
- You regularly cut through thick hardwood or metal ā the compact M12 motor lacks the torque of a 20V brushless model like the DEWALT alternative I tested.
- You prefer tool-less blade changes ā the Milwaukee uses a screw-on universal adaptor, which works fine but is slower than the quick-release systems on some competitors.
If you’re already invested in Milwaukee’s M12 platform and need a featherweight oscillating tool for detail work, this is my top recommendation. For everyone else, it’s worth checking the current price before deciding between this and the alternatives.
- UNIVERSAL ADAPTOR: You can use accessories from other multi tools with the...
- 12 SPEED SETTINGS: Switch between 5,000 and 20,000 orbits per minute with...
- SANDING: An included sanding head with sanding pads will let you put the...
Common Issues & Fixes
I’ve run into a few quirks while using this tool, and I’ve also picked up some tricks from other owners. Here’s what I learned to keep things running smooth.
Blade Slipping or Wobbling
The problem: The universal adaptor can work loose over time, causing the blade to shift mid-cut and leaving you with uneven results.
My fix: I tighten the screw with the included hex wrench every few uses, and I make sure the blade sits flat against the adaptor before locking it down. A little thread locker on the adaptor screw also helps prevent it from backing out.
Battery Draining Faster Than Expected
The problem: Running at 20,000 OPM constantly can drain an M12 battery in about 12-15 minutes, which caught me off guard on bigger jobs.
My fix: I dial the speed down to the minimum needed for the material ā 5,000 OPM for sanding and light trimming, and only bump up to higher speeds for aggressive cutting. Keeping a second battery charged and ready is also a lifesaver.
Excessive Vibration in Your Hands
The problem: At full speed, the oscillating action transmits noticeable vibration, especially during longer cutting sessions.
My fix: I wear a padded work glove on my dominant hand and take breaks every 10-15 minutes. Matching the speed to the task ā rather than always running flat out ā also cuts down on the buzz considerably.
Dust and Debris Clogging the Speed Dial
The problem: Sanding and cutting produce fine dust that can work its way into the speed adjustment knob, making it stiff to turn.
My fix: I blow out the tool with compressed air after each session, focusing on the dial area and the vents. Keeping the tool in a case or bag when not in use also keeps the dust from settling in.
Warranty & Support
Milwaukee backs this tool with a 5-year manufacturer warranty, which covers defects in materials and workmanship. I registered mine online right after purchase ā it took about two minutes. If you run into issues, Milwaukee’s customer service is responsive, and the warranty covers the tool itself, though not the battery since it’s sold separately.
- UNIVERSAL ADAPTOR: You can use accessories from other multi tools with the...
- 12 SPEED SETTINGS: Switch between 5,000 and 20,000 orbits per minute with...
- SANDING: An included sanding head with sanding pads will let you put the...
Frequently Asked Questions
Does this tool come with a battery?
No, it doesn’t. The 2426-20 is power-only, so you need to supply your own M12 battery and charger. If you’re new to the M12 system, I’d recommend picking up a starter kit with a battery and charger separately, or checking if you already have compatible batteries from other Milwaukee M12 tools.
What accessories are included in the box?
You get the tool itself, a multi-use blade, a sanding pad, and multi-grit sanding papers ā enough to get started on most projects right away. The universal adaptor is also included, which screws onto the head so you can use accessories from other multi-tool brands. That saved me from buying a whole new accessory set.
How long does the battery last on a full charge?
It depends on what you’re doing and which M12 battery you use. With a standard 2.0Ah M12 battery, I got about 20 minutes of continuous sanding at mid-range speed, and closer to 12-15 minutes when cutting aggressively at 20,000 OPM. The on-board fuel gauge shows remaining charge in 25% increments, so you always know where you stand.
Is this tool compatible with other brands’ blades?
Yes, thanks to the universal adaptor that screws onto the head. I tested it with blades from a couple of other brands and they fit fine. It’s not quite as fast as a tool-less quick-release system, but it’s nice to have the flexibility to use whatever accessories you already own.
How loud is it during use?
It’s about what you’d expect from an oscillating tool ā noticeable but not deafening. At lower speeds around 5,000 OPM, it’s fairly quiet, but cranking it up to 20,000 OPM definitely gets louder. I’d recommend ear protection for extended use at high speed, especially in enclosed spaces.
Is the 5-year warranty actually any good?
I’ve had good experiences with Milwaukee’s warranty process in the past. It covers defects in materials and workmanship for 5 years, which is solid for a cordless tool. Just keep your receipt and register the tool online ā it takes a couple of minutes. The battery isn’t covered since it’s sold separately, so keep that in mind.
My Final Verdict
After weeks of testing, the Milwaukee 2426-20 M12 12 Volt Redlithium Ion 20,000 OPM Variable Speed Cordless Multi Tool has earned a permanent spot in my kit. The 12 speed settings between 5,000 and 20,000 OPM give me precision control, and at just 1.1 pounds, it’s the most comfortable oscillating tool I’ve used for overhead work. I’d recommend it to anyone already invested in the M12 system who needs a lightweight detail tool, but not to someone looking for heavy-duty cutting power.
The battery-not-included deal is definitely the biggest hurdle ā it’s an extra purchase you have to plan for. But honestly, the combination of the universal adaptor, all-metal gear case, and 5-year warranty makes it worth the extra step. For trim work, sanding, and tight-space cuts, I’d buy it again without hesitation.
Ready to Check the Price?
If you’re already in the M12 ecosystem and need a featherweight multi-tool for detail work, this one is absolutely worth a look.
See Current Price on Amazon ā
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