Milwaukee 3404-20 M12 FUEL Hammer Drill Review: Worth It? (October 2026)
The Milwaukee 3404-20 is a compact 12V hammer drill and driver with a 1/2 in all-metal chuck, brushless motor and mechanical clutch. It weighs 2.6 lb and is sold as a bare tool.
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The Milwaukee 3404-20 is a compact 12V hammer drill and driver with a 1/2 in all-metal chuck, brushless motor and mechanical clutch. It weighs 2.6 lb and is sold as a bare tool.
It fits best when you already use Milwaukee's M12 battery platform or have a plan for batteries and charging. For routine drilling without hammer mode, a standard drill-driver kit may be a better match.
Milwaukee 3404-20 review: what stands out?
The 3404-20 combines hammer-drill function with a compact 12V design. Milwaukee says its brushless motor handles a wide range of applications, and the drill has a 1/2 in all-metal chuck and mechanical clutch.
Milwaukee 3404-20 M12 FUEL 1/2 in. Hammer Drill/Driver (Bare Tool): Best for compact hammer drilling
- 12V M12 platform
- 1/2 in all-metal chuck
- Brushless motor
- 2.6 lb weight
A compact hammer drill and driver for buyers who want one tool for fastening, standard drilling and hammer drilling. The bare-tool format means you need compatible M12 batteries and a charger.
Pros
- Hammer drill and driver functions
- Brushless motor
- 1/2 in all-metal chuck
- Mechanical clutch
Cons
- Bare tool, so batteries and charger are separate
Its maximum speed is 1,500 rpm, and its maximum torque is 400 in-lb. Those figures help frame the tool, but they don't tell you how quickly it will finish a particular hole or how long a battery will last.
Milwaukee gives its weight as 2.6 lb and describes it as lightweight for tool-belt portability and less fatigue during a workday. Your full setup will weigh more once you add a battery.
What the specs mean for everyday work
The 1/2 in chuck accepts bits with shanks up to that size, while the mechanical clutch helps with consistency when driving fasteners. That combination suits switching between drilling and fastening tasks.
Hammer mode adds a forward tapping action as the bit turns. It can help with suitable masonry jobs, but a hammer drill is not the same as a rotary hammer, and neither the tool name nor its torque figure guarantees performance in every material.
For a standard drill's basic functions and clutch settings, see what the numbers on a drill mean. If you're deciding whether hammer action is necessary, hammer drill vs regular drill lays out the difference.
Is the 3404-20 a good fit for your work?
The 3404-20 fits buyers who need one compact tool for fastening, regular drilling and hammer drilling. Its 1/2 in chuck has a larger capacity than the 3/8 in alternatives here.
It may suit projects that call for drilling into masonry, installing anchors or using a small drill for mixed tasks. Use the right bit, select the correct mode and follow the tool instructions for the material.
When should you pick a standard drill instead?
Choose a standard drill-driver if most of your work involves wood, metal and screws. The [Makita FD09R1 12V CXT 3/8 in.
Driver-Drill Kit](/best-12v-cordless-drill/) includes two batteries, a charger and a case, which makes it a more complete starting point if you don't already own compatible batteries.
The Milwaukee M12 Subcompact Brushless 3/8 in. Drill/Driver is another standard drill-driver option.
It has a 3/8 in chuck and 12 clutch settings, but no hammer function.
For frequent drilling in hard concrete, compare the hammer drill with a rotary hammer designed for that workload. The guide to using a hammer drill at home covers setup and technique.
What does the bare-tool format mean?
The 3404-20 is sold as a bare tool, so it does not include a battery or charger. Check your M12 batteries for compatibility and condition, or include the cost of a suitable battery and charger in your decision.
This matters most if you are starting from scratch. The Makita FD09R1 includes two batteries, a charger and a tool case, while the Bosch Flexiclick kit includes two batteries and multiple attachments.
Staying within a battery platform can make sense if you already own tools that use it. If not, compare the complete setup you need, including battery, charger and any case or bits you expect to use.
How does the 3404-20 compare with other 12V drills?
The best alternative depends on whether you value hammer action, kit contents or access in tight spaces. These models differ in function and included items.
| Model | Main difference | Best fit |
|---|---|---|
| Milwaukee 3404-20 | 1/2 in hammer drill, bare tool | Hammer drilling in a compact M12 tool |
| Makita FD09R1 | 3/8 in driver-drill kit, two batteries and charger | Drilling and fastening with kit items included |
| Bosch GSR12V-140FCB22 | Drill/driver kit with Flexiclick attachments | Corners, edges and varied access |
| Milwaukee 3401-20 | 3/8 in drill/driver with 12 clutch settings | Basic drilling and fastening |
The Bosch GSR12V-140FCB22 is worth considering when access is the main problem. Its kit includes a keyless chuck, locking bit holder, right-angle and offset-angle attachments.
The right-angle and offset heads rotate to 16 positions.
Read our Milwaukee cordless drill guide for a wider look at Milwaukee drill options. If you're choosing between battery platforms, Milwaukee M12 vs M18 drills explains the size and system trade-offs.
What should you know before drilling masonry?
A hammer drill can help with suitable masonry holes, but the bit and material matter. Use a masonry bit suited to the job, set the tool to hammer mode, and start slowly enough to keep the bit from wandering.
Check for hidden wiring, pipes and other hazards before drilling into a wall. Follow the tool and bit instructions for the material and task.
For a walkthrough, read how to drill into brick with a cordless drill. For harder material, see how to drill into concrete with a hammer drill.
Is the Milwaukee 3404-20 worth choosing?
The Milwaukee 3404-20 suits buyers who want compact hammer-drill capability and already have M12 batteries. Its 1/2 in chuck, 2.6 lb weight and brushless motor fit those looking for a compact tool for drilling and driving.
Pick the Makita kit if you need batteries and a charger for standard drilling and fastening. Choose Bosch if right-angle and offset access matter most, or a regular M12 drill-driver if you don't need hammer mode.
Our score weighs specs, features and buyer feedback against what you're shopping for. For more options, compare the best Milwaukee cordless drills and the best 12V cordless drills.
Frequently asked questions
Is the Milwaukee 3404-20 a hammer drill?
Yes. The Milwaukee 3404-20 is a 12V hammer drill and driver with a 1/2 in chuck.
Hammer action is intended for drilling, but use the right bit and follow the tool instructions for your material.
Does the Milwaukee 3404-20 come with a battery?
No. The 3404-20 is a bare tool, so it does not include a battery or charger.
You need compatible M12 batteries and a charger if you don't already own them.
How heavy is the Milwaukee 3404-20?
The Milwaukee 3404-20 weighs 2.6 lb. A battery adds weight to the complete setup, so account for that when comparing tools for overhead work or carrying through a workday.
Should I choose the 3404-20 or a regular drill?
Choose the 3404-20 if you need hammer action along with drilling and driving. A standard drill-driver fits wood, metal and fastening jobs that don't need that mode.
For frequent concrete work, compare tools designed for that workload.
