Milwaukee 2457-21 M12 Cordless Ratchet Kit 3/8 Inch
- Power Source: Corded Electric
- Maximum Rotational Speed: 250 rpm
- Voltage: 12 volts
- Item Weight: 4.63 pounds
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact 12 volt Milwaukee impact tool suited to one handed fastening work within the M12 battery ecosystem.
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ASIN: B006GKFWSSModel: 2457-21Category: Impact Drivers & Wrenches
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.
Pros and cons
- 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 |
| Dimensions & fit | |
| Item Weight | 4.63 poundshigher than 70% of 184 impact drivers & wrenches |
| Item Length | 10.1 incheshigher than 61% of 128 impact drivers & wrenches |
| Capacity & performance | |
| Maximum Rotational Speed | 250 rpmlower than 93% of 71 impact drivers & wrenches |
| Power & efficiency | |
| Power Source | Corded Electric |
| Voltage | 12 voltslower than 76% of 171 impact drivers & wrenches |
| Battery Type | Lithium-Ion |
| Included components | |
| Unit Count | 1 |
| Included Components | 30-Minute Charger, Adapter, Carrying Case, M12 Red Lithium Battery, Ratchet |
| Other details | |
| Number Of Batteries | 1 Lithium Ion batteries required. (included) |
| Item Type Name | Milwaukee 2457-21 Cordless Ratchet Kit |
| Set Name | 2457-21 |
Closest rivals on specs
ACDelco ARW12103-K1 G12 Brushless Ratchet and Impact Wrench Combo- Maximum Rotational Speed 250 vs 195 rpm (+28%)
AOBEN AB7331T 12V Cordless Electric Ratchet Wrench Set- Item Length 10.1 vs 12 inches (-16%)
Frequently asked questions
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.