Milwaukee 2457-21 Impact Black
- Impact
- 1.5 amps
- Corded electric
- 4.06 pounds
- Better rated than 62%
- More reviewed than 86%
A compact 12 volt impact tool at just over 4 pounds, built for confined-space fastening rather than heavy-duty torque work.
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How it ranks among the 284 impacts we track
4.7★ across 1,700 Amazon ratings, Bayesian-smoothed toward the category average.
1,700 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Modest tracked demand 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 4.06 pounds, built around a 1.5 amp motor. Its compact size and battery platform target technicians working in tight spaces where a full-size impact wrench will not fit.
Milwaukee positions this model in its impact category, and the 12 volt platform points to the brand's compact cordless line built for one-handed use in confined areas such as under dashboards or inside cabinets. The listed 250 RPM figure reflects a controlled, lower-speed setting rather than a high-speed spec, which fits precision fastening work over raw output. No seller description or buyer reviews are attached to this listing.
- 12 volt cordless power source
- 1.5 amp rated motor
- 250 RPM listed speed
- 4.06 pound tool weight
Who it's for
Suits technicians and installers who need a compact impact tool for confined spaces, such as automotive or cabinet work. Less suited to anyone needing high-torque output for large fasteners, where a full-size 18 volt or 20 volt impact wrench would fit better.
Strengths and trade-offs
Drawn from this product's published specifications.
- Compact 12 volt platform fits tight spaces
- Light 4.06 pound body for one-handed use
- Milwaukee build quality on a known model
- Lower RPM limits speed on bulk fastening
- Not suited to high-torque large fasteners
- No reviews included to confirm long-term durability
Performance notes
The 1.5 amp motor and 12 volt platform keep the tool compact at 4.06 pounds, favoring maneuverability over raw power. The listed 250 RPM speed suggests a controlled operating range suited to precise fastening rather than fast bulk driving.
Specifications
| Brand | MILWAUKEE |
|---|---|
| Model | 2457-21 |
| Amperage | 1.5 amps |
| Power Source | Corded electric |
| Item Weight | 4.06 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 Impact BlackThis product | 4.7 / 5 | 1,700 | 4.0 / 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 voltage system does the Milwaukee 2457-21 use?
It runs on a 12 volt cordless platform.
How much does the Milwaukee 2457-21 weigh?
It weighs 4.06 pounds.
Is the Milwaukee 2457-21 suited to large fasteners?
Its compact 12 volt platform and 1.5 amp motor are built for confined-space work rather than high-torque jobs on large bolts.