Milwaukee 3450-20 Impact Review
Our verdict
The Milwaukee 3450-20 is a 12V compact cordless impact driver weighing just 1.3 pounds, priced at $95.00 with 4.6 stars across 360 reviews and 500 units bought last month, making it the standout choice for anyone who needs a featherweight driver for tight spaces and overhead work.
Check price on AmazonBest for
Electricians, HVAC technicians, and DIYers who prioritize low weight and compact size for overhead or confined-space fastening on Milwaukee's M12 platform.
Skip if
You need the torque capacity and speed of a full 20V impact driver for heavy-duty lag bolts or framing work, where 12V tools trade power for portability.
- Power Source Battery Powered
- Voltage 12 Volts
- Amps 2 Amps
- Speed 3000 RPM
- Weight 1.3 Pounds
- Dimensions 2"L x 6"W x 6"H
- Priced 25% below the category median ($127.00 across 77 tracked models)
Our scorecard
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Owner rating4.6/5
4.6 average across 360 owner ratings
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Popularity2.3/5
360 owner reviews, fewer than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other power tools and workshop machinery we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
At 1.3 pounds the Milwaukee 3450-20 is by far the lightest impact driver in this category. Its 12V M12 platform deliberately sacrifices maximum torque compared to 20V alternatives, but delivers significant ergonomic advantages: less fatigue on long overhead runs, easier one-hand operation, and a footprint that fits where larger tools cannot. The compact dimensions of 2 inches long by 6 inches wide by 6 inches tall confirm it is purpose-built for tight quarters.
The 3000 RPM speed is competitive within the 12V class and adequate for the standard fasteners this tool is designed to drive, including cabinet screws, electrical box anchors, and finish hardware. At $95.00 it sits above several 20V budget options, a price reflective of Milwaukee's M12 platform quality and the tool's niche utility. The 360 reviews at 4.6 stars and 500 monthly purchases show a consistent, loyal buyer base.
For Milwaukee M12 platform users, the 3450-20 is a natural addition alongside M12 drills and multi-tools. Buyers not yet on the M12 system should factor in battery cost, as the 2-amp draw means a compact 2Ah pack will deliver reasonable runtime for this class of work.
Pros
- 1.3-pound weight is the lightest in this impact driver category by a significant margin
- Compact 6-inch height fits into spaces where full-size 20V tools cannot reach
- 4.6 stars across 360 reviews with 500 monthly purchases shows consistent buyer demand
- Milwaukee M12 battery platform offers integration with a wide professional tool lineup
- 3000 RPM delivers adequate speed for the light to medium fastening tasks this tool targets
Cons
- 12V platform produces less torque than 20V impact drivers for heavy lag bolt or structural work
- At $95.00 it costs more than some 20V budget options, with the trade-off being weight not power
- Tool-only listing means M12 battery and charger are an additional cost for new platform users
Specifications
| Power Source | Battery Powered |
|---|---|
| Voltage | 12 Volts |
| Amps | 2 Amps |
| Speed | 3000 RPM |
| Weight | 1.3 Pounds |
| Dimensions | 2"L x 6"W x 6"H |
Performance notes
Battery-powered at 12V with a 2-amp draw and 3000 RPM no-load speed. Weight of 1.3 pounds and dimensions of 2 inches long by 6 inches wide by 6 inches tall describe a genuinely compact form factor. Ideal for finish carpentry, cabinet installation, electrical rough-in, and any application where tool weight and access matter more than maximum torque output.
What buyers say
Owners consistently cite the 3450-20's exceptional lightness as the primary reason for buying. Many reviewers are professionals who use it alongside heavier Milwaukee M12 or M18 tools and reach for the 3450-20 specifically for overhead and confined work. The most common reservation is that it is underpowered for heavy structural fastening, which is expected given the 12V platform.
Similar power tools and workshop machinery to consider
Frequently asked questions
Can the Milwaukee 3450-20 drive lag bolts?
Based on specs and owner reviews, the 3450-20 handles standard lag screws in softwood adequately but may struggle with long lags in dense hardwood or structural applications. For heavy lag driving, a 20V impact driver would be a more suitable choice.
Is the Milwaukee M12 battery compatible with other Milwaukee tools?
Yes. The Milwaukee M12 battery platform is compatible with the full range of Milwaukee M12 tools including drills, multi-tools, lights, and more. Existing M12 batteries will work with the 3450-20.
Have questions about 12V vs 20V impact drivers for your work?
Email the ToolGalaxy team at hello@toolgalaxy.com for a recommendation based on your specific tasks.