Milwaukee 2457-21 Impact
- Impact
- Corded electric
- 4.63 pounds
- 12 volts
- Better rated than 62%
- More reviewed than 82%
A compact 12 volt Milwaukee impact tool suited to one handed fastening work within the M12 battery ecosystem.
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How it ranks among the 284 impacts we track
4.7★ across 1,396 Amazon ratings, Bayesian-smoothed toward the category average.
1,396 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
400+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 284 impacts we track - how the scorecard works · full impacts data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The Milwaukee 2457-21 is a 12 volt cordless impact tool weighing 4.63 pounds, built around Milwaukee's M12 battery platform. It is categorized as an impact driver or wrench for compact, one handed fastening work.
Milwaukee's M12 line targets tight spaces and one handed use, and the 2457-21 fits that pattern with its 12 volt power source. The listing lists a 250 RPM speed rating, though impact tools are typically compared on torque and impacts per minute as much as RPM, so check the full spec sheet if that number is the deciding factor.
- Milwaukee M12 12 volt platform
- 250 RPM speed rating
- 4.63 pound weight
- Cordless impact driver or wrench
Who it's for
Tradespeople and DIYers already using Milwaukee's M12 cordless platform who want a compact impact tool for fastening in confined spaces. Less suited to jobs demanding the higher torque of full size 18V or 20V impact wrenches.
Strengths and trade-offs
Drawn from this product's published specifications.
- Compact 12 volt M12 platform
- 4.63 pound weight suits one handed use
- Cordless operation for mobility on the job
- Lower power ceiling than full size 18V or 20V impact wrenches
- Speed rating alone does not capture torque output
Performance notes
Running on Milwaukee's 12 volt M12 system, this tool is built for compact, one handed fastening rather than heavy torque jobs. At 4.63 pounds it is easy to control with one hand, and its size makes it useful in confined spaces where larger impact wrenches will not fit.
Specifications
| Brand | MILWAUKEE |
|---|---|
| Model | 2457-21 |
| Power Source | Corded electric |
| Item Weight | 4.63 pounds |
| Voltage | 12 volts |
| Speed | 250 rpm |
Other MILWAUKEE impacts
How it compares
This product against the closest alternatives we track in impacts.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Milwaukee 2457-21 ImpactThis product | 4.7 / 5 | 1,396 | 4.4 / 5 |
| DEWALT DCF845B ImpactDeWALT | 4.7 / 5 | 12,700 | 4.5 / 5 |
| GEARWRENCH 81270 ImpactGEARWRENCH | 4.7 / 5 | 4,983 | 4.4 / 5 |
| AOBEN AB7331T ImpactAOBEN | 4.4 / 5 | 10,707 | 4.4 / 5 |
| Ryobi P235A ImpactRyobi | 4.7 / 5 | 4,700 | 4.4 / 5 |
Similar impacts from other brands
Questions about the MILWAUKEE 2457-21
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What battery platform does the Milwaukee 2457-21 use?
Milwaukee's 12 volt M12 cordless platform.
How much does the 2457-21 weigh?
4.63 pounds.
Is the 2457-21 suited to heavy duty impact work?
It is a compact 12 volt tool, so full size 18V or 20V impact wrenches offer more torque for heavy duty jobs.