Best Milwaukee Hammer Drill (Combi Drill) of 2026
A combi drill is what Milwaukee sells in the US as a hammer drill/driver: drill, driver and hammer mode in one tool. Choosing the best one means balancing torque, battery platform and weight for the work you actually do. We compared the published specs across Milwaukee's current M18 and M12 hammer drill line-up for 2026.
Quick answer
The Milwaukee M18 FUEL 2904-20 hammer drill is our top pick: it is the Gen 4 flagship, rated at 1,400 in-lbs of torque with a 1/2 in all-metal chuck. For a lighter option, the M12 FUEL 2504-20 is the best compact hammer drill, with 350 in-lbs and a full 1/2 in chuck in a tool you can use one-handed.
Why trust ToolBuyerHub
- Compared on published specs (torque, chuck, hammer mode)
- Battery platform & ecosystem compared
- Model numbers verified against Milwaukee's line-up
- Build quality & warranty checked
- Scores are our own editorial ratings, not a review-count average
- No fake hands-on claims
Research updated June 2026.
Milwaukee M18 FUEL 2904-20
Gen 4 FUEL torque and durability for heavy-duty work.
| Product | Best For | Key Spec | Editor score | Price |
|---|---|---|---|---|
| Milwaukee M18 FUEL 2904-20 | Overall / Heavy-Duty | 1,400 in-lbs torque | 4.8/5 | Check |
| Milwaukee M12 FUEL 2504-20 | Compact / Lightweight | 350 in-lbs, 1/2 in chuck | 4.7/5 | Check |
| Milwaukee M18 FUEL 2804-20 | Value / Previous-Gen FUEL | 1,200 in-lbs torque | 4.6/5 | Check |
| Milwaukee M18 FUEL 2904-22 | Kit / Batteries Included | Comes with 2x XC5.0 batteries | 4.8/5 | Check |
| Milwaukee M12 2408-20 | Budget / Basic Tasks | 300 in-lbs, brushed motor | 4.4/5 | Check |
Milwaukee M18 FUEL 2904-20
Best Overall Heavy-Duty Hammer DrillPros
- Class-leading torque for large hole saws, self-feed bits and masonry.
- All-metal chuck and gearbox built for daily jobsite use.
- AUTOSTOP kickback control and a genuinely useful LED work light.
Cons
- Heavier and longer than the M12 models, tiring overhead.
- Price is high, especially as a tool-only purchase.
The Milwaukee M18 FUEL 2904-20 is the fourth-generation FUEL hammer drill/driver and the flagship of the line. Milwaukee rates it at 1,400 in-lbs of peak torque, a real step up from the 1,200 in-lbs of the Gen 3 model it replaced, and the two-speed gearbox tops out at roughly 2,000 rpm for fast drilling in wood.
It is the biggest and heaviest drill here, but the balance is good and the rubber overmold grip takes the sting out of long sessions. It is a significant investment, but for heavy framing, deck building, or metal fabrication, this is the most capable hammer drill in the Milwaukee line-up for 2026.
Milwaukee M12 FUEL 2504-20
Best Compact / Lightweight Hammer DrillPros
- Short and light enough for cabinets, joist bays and other tight spaces.
- Full 1/2 in all-metal chuck, unusual on a 12V drill.
- Real hammer mode for light masonry such as anchors in brick.
Cons
- Not the tool for large hole saws or sustained concrete drilling.
- Runtime is shorter than M18, especially on small 2.0Ah packs.
The M12 FUEL 2504-20 is the compact hammer drill/driver in the M12 line, and it is the one to pick if most of your work is overhead, in a panel, or under a sink. Despite the 12V platform it takes a full 1/2 in all-metal chuck, so it accepts the same bits as an 18V drill rather than limiting you to 3/8 in shanks.
Note that this is a different tool from the M12 FUEL 2505-20, which is the four-in-one installation drill/driver with swappable heads and no hammer mode. If you want hammer function on M12, the 2504-20 is the model number to look for. It shares the M12 battery platform with dozens of other Milwaukee tools, so packs carry over.
Milwaukee M18 FUEL 2804-20
Best Value M18 FUEL Hammer DrillPros
- Full FUEL performance at a lower price than the current Gen 4.
- Shorter and lighter than the 2904-20 for the same chuck size.
- Works with every M18 battery, including High Output packs.
Cons
- 200 in-lbs less peak torque than the Gen 4 model.
- No AUTOSTOP kickback control.
The Milwaukee M18 FUEL 2804-20 is the previous-generation FUEL hammer drill, and it is still widely sold. It is a genuine FUEL tool with a POWERSTATE brushless motor, REDLINK PLUS electronics and 1,200 in-lbs of torque, so it is not a step down in build quality, only in peak output.
It is shorter and lighter than the 2904-20 while keeping the same 1/2 in all-metal chuck, which makes it the better all-rounder for daily use in framing bays and stud walls. This model offers the best value if you are starting an M18 collection and want FUEL performance without paying the flagship price.
Milwaukee M18 FUEL 2904-22
Best Kit with BatteriesPros
- Two XC5.0 REDLITHIUM packs cover a full day of mixed work.
- Includes a charger, side handle, belt clip and contractor bag.
- Identical Gen 4 FUEL tool to our top pick.
Cons
- Higher upfront cost than the tool-only version.
- Bag is functional but not as protective as a hard case.
The Milwaukee M18 FUEL 2904-22 is the same drill as our top pick, packaged with two REDLITHIUM XC5.0 batteries and a charger. These are the standard XC packs rather than the High Output line, which is worth knowing if you were expecting HO cells, but for a hammer drill they are the sensible pairing on capacity and weight.
If you do not already own M18 batteries, this is the most practical way into the platform: the two packs alone account for a large share of the kit price. The included soft-sided bag keeps the drill, charger and accessories together.
Milwaukee M12 2408-20
Best Budget / Basic Hammer DrillPros
- Cheapest way into the M12 platform with a real hammer mode.
- Very light and short for shelving, blinds and furniture assembly.
- Reliable brushed motor for occasional use.
Cons
- 3/8 in chuck limits you on larger bit shanks.
- Less power and shorter runtime than the brushless FUEL models.
The Milwaukee M12 2408-20 is the budget hammer drill/driver for light DIY: hanging shelves, fixing blinds into brick, assembling furniture and drilling small pilot holes. It is the lightest tool in this line-up and easy to work with one hand.
Do not confuse it with the M12 2407-20, which looks near-identical but is a plain drill/driver with no hammer mode. If you want the hammer function, the 2408-20 is the one. It uses a brushed motor, so runtime and lifespan trail the FUEL models, but for occasional home maintenance it is a genuinely useful tool at a low price.
What to check before buying a Milwaukee hammer drill
Check the platform first. M18 offers more power and longer runtime for heavy work, while M12 is lighter and shorter. Think about the tasks you do most often. If you drill masonry regularly or run large hole saws, choose an M18 FUEL model. For light assembly and electrical work, M12 is enough.
Then check the chuck. A 1/2 in all-metal chuck accepts larger bit shanks and grips better under load than a 3/8 in chuck. Also confirm the tool actually has a hammer mode: several Milwaukee drills that look similar, such as the M12 2407-20 and the M12 FUEL 2505-20 installation driver, are drill/drivers only. The three-mode collar marked with a hammer icon is what you are looking for.
Mistakes to avoid when buying a hammer drill
One common mistake is buying a tool-only model without checking whether you already own compatible batteries. Milwaukee packs are not cross-compatible between M12 and M18. Another is going by looks rather than model number, since Milwaukee's drill/drivers and hammer drills share the same body.
Do not assume a hammer drill replaces a rotary hammer. For anchors in brick and block a hammer drill is fine, but for repeated holes in poured concrete an SDS rotary hammer is the right tool. Finally, avoid buying too little torque for your work: a 12V drill will not stand in for an 18V drill on heavy framing.
FAQs
What is the best Milwaukee hammer drill for heavy duty use?
The Milwaukee M18 FUEL 2904-20 is the best for heavy duty use, rated at 1,400 in-lbs of torque.
Is an M12 Milwaukee hammer drill powerful enough for DIY?
Yes. The M12 FUEL 2504-20 handles most DIY tasks, including driving screws in wood and setting anchors in brick.
What is the difference between M18 and M18 FUEL?
FUEL models use a POWERSTATE brushless motor, REDLINK PLUS electronics and REDLITHIUM batteries together, giving more torque and longer runtime than the standard M18 line.
Is a combi drill the same as a hammer drill?
Yes. Combi drill is the UK name for what Milwaukee sells in the US as a hammer drill/driver: drill, driver and hammer modes in one tool.
Are Milwaukee hammer drills compatible with other brands' batteries?
No. Milwaukee drills only run on Milwaukee M12 or M18 packs.
What is the warranty on Milwaukee hammer drills?
Milwaukee offers a 5-year limited warranty on most M18 and M12 cordless tools.
Which Milwaukee hammer drill here is the lightest?
The M12 2408-20, followed closely by the M12 FUEL 2504-20. Both are far lighter than any M18 model.
Can I use M18 batteries on M12 tools?
No. M18 packs are physically larger and use a different stem, so they will not fit M12 tools.
Is the M12 FUEL 2505-20 a hammer drill?
No. The 2505-20 is the M12 FUEL installation drill/driver with interchangeable heads and no hammer mode. The M12 FUEL hammer drill is the 2504-20.
Does the Milwaukee 2904-20 come with batteries?
No, the 2904-20 is tool-only. The 2904-22 kit includes two XC5.0 batteries and a charger.
Our verdict
For most users, the Milwaukee M18 FUEL 2904-20 is the best overall hammer drill, with 1,400 in-lbs of torque and the toughest build here. If you want a lighter tool for everyday work, the M12 FUEL 2504-20 is the best compact choice and still takes a 1/2 in chuck. For value, the previous-generation M18 FUEL 2804-20 delivers 1,200 in-lbs for less money.