Milwaukee 3450-20 M12 Subcompact 1/4 in Hex Impact Driver
- 1100 inch pounds of torque, 3000 RPM maximum speed
- 12 volt lithium-ion, M12 system devices
- 6.35 millimeter maximum chuck size
- 2 amps listed
- 1.3 pounds, 2 x 6 x 6 inches
- Battery and charger not included
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact bare-tool impact driver on the M12 battery system, with a high torque rating for its size. Battery and charger are separate purchases.
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ASIN: B0FBMN6J8FModel: 3450-20Category: Impact Drivers & Wrenches
Overview
A tight cabinet or engine bay is where the Milwaukee 3450-20 impact driver earns its place, thanks to a short, light body. It works with M12 system devices and takes a quarter-inch style chuck.
Torque is the reason to consider it, along with a body small enough for confined spots. The listing says battery and charger are not included, so factor in a pack if you have none.
Who it's for
Installers and mechanics already on the M12 system. Anyone expecting drilling-style hammer action should look at a hammer drill.
Pros and cons
- High torque rating listed
- Light, compact body
- Lithium-ion battery system
- Battery and charger not included
- Small chuck limits bit size
- Impact driver, not a drill
Performance notes
Impact action multiplies torque at the fastener, so screws and bolts seat with less hand force. Maximum speed sets pace on small screws. Battery capacity, not supplied, decides run time.
Specifications
| Brand | MILWAUKEE |
|---|---|
| Model | 3450-20 |
| Dimensions & fit | |
| Maximum Chuck Size | 6.35 millimeters |
| Item Dimensions L X W X H | 2 x 6 x 6 inches |
| Item weight | 1.3 pounds |
| Capacity & performance | |
| Maximum Rotational Speed | 3000 RPM |
| Drilling Capacity Wood | 6.35 millimeters |
| Drilling Capacity Metal | 0.25 inches |
| Power & efficiency | |
| Voltage | 12 volts |
| Amperage | 2 amps |
| Battery Type | Lithium-ion |
| Power Source | Battery Powered |
| Construction & materials | |
| Material Type | Metal |
| Compatibility & installation | |
| Compatible Devices | M12 system devices |
| Included components | |
| Included Components | Battery and charger not included |
| Unit Count | 1.0 Count |
| Other details | |
| Maximum Torque | 1100 inch poundslower than 74% of 36 impact drivers & wrenches |
| Drill Type | Impact driver |
Closest rivals on specs
Bosch PS42-02 12V Max EC Brushless Impact Driver Kit- Maximum Torque 1100 vs 975 in-lb (+13%)
- Maximum Rotational Speed 3000 vs 2600 RPM (+15%)
Makita XDT13Z 18V LXT Brushless Impact Driver- Maximum Torque 1100 vs 1500 in-lb (-27%)
- Maximum Rotational Speed 3000 vs 3400 RPM (-12%)
CRAFTSMAN CMCF801D1 1/4 in Impact Driver Kit- Maximum Torque 1100 vs 1800 in-lb (-39%)
Frequently asked questions
Is the Milwaukee 3450-20 a drill?
No. The drill type is impact driver, with a 6.35 millimeter chuck. It is not a hammer drill.
Does the Milwaukee 3450-20 include a battery?
No. The listing says battery and charger are not included.
Which batteries work with the Milwaukee 3450-20?
The listing names M12 system devices as compatible.