Key Takeaways
- The Milwaukee® 3601-20 compact drill, measuring 5.7 inches and weighing 2.3 pounds, is suitable for tight spaces and overhead work.
- Full-size M18 drills, such as the 2904-20 Hammer Drill, are longer and heavier, built to sustain prolonged heavy-duty use.
- Both formats share the same M18 REDLITHIUM battery, so adding either drill from the Milwaukee® range at GenuineTools keeps your existing packs and chargers in play.
- Finish trades and DIYers usually fit the compact 3601-20, while framers and all-day contractors match the 2904-20.
- GenuineTools stocks both the compact and full-size Milwaukee® M18 Drill/Driver, factory-sealed and backed by a 30-day money-back guarantee.
How Do Milwaukee® Compact & Regular Drills Differ?
Milwaukee® compact drills and regular M18 drills both drive screws and drill holes, but they're built for different work. Compact drills like the 3601-20 are suitable for tight panels, overhead installations, and finish work where maneuverability is key. Full-size models, like the 2904-20 Hammer Drill, feature Milwaukee’s POWERSTATE™ motor for sustained heavy-duty performance for framing, driving long screws, and working through dense materials, while maintaining consistent output during extended use.
Both run on the same M18 REDLITHIUM battery, so the real question is matching the tool to the job in front of you. Below, we break down the specs, torque, runtime, and use cases for each, so you can pick the right Milwaukee® drill from the GenuineTools range with confidence.
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Milwaukee® Compact vs Regular Drill: Key Specs Compared
The Milwaukee® (3601-20) compact drill weighs just 2.3 lbs.
Size & Weight
The Milwaukee® M18 Compact Brushless Drill/Driver (3601-20) at 5.7" is purpose-built for control. If you're driving screws into ceiling joists or working inside a tight electrical panel, the shorter nose-to-tail measurement means fewer knuckle collisions and better sight lines to your fastener.
Full-size Milwaukee® drills like the M18 FUEL™ 2904-20 Hammer Drill Driver run 6.9" long. That extra inch-plus of length adds leverage and houses a more powerful motor assembly, but it becomes a genuine obstacle when you're working inside a wall cavity or drilling at an awkward angle above your head.
Weight follows the same pattern. Compact models are noticeably lighter, which directly reduces fatigue during long sessions.
Power & Torque
The Milwaukee® 3601-20 compact drill delivers 550 in-lbs of torque at up to 1,700 RPM, powered by Milwaukee®'s brushless motor technology. For most home improvement tasks (hanging doors, assembling furniture, drilling through timber framing, installing hardware), that's more than sufficient.
Where regular Milwaukee® drills pull ahead is in sustained heavy-duty performance. The M18 FUEL™ ½" Hammer Drill Driver uses Milwaukee's POWERSTATE™ brushless motor, which is engineered for the most demanding drilling applications: dense hardwood, masonry, and high-volume job site work. The POWERSTATE™ motor combined with REDLINK PLUS™ Intelligence provides top-tier thermal management, meaning the drill maintains consistent output even under prolonged stress without overheating.
For most weekend DIY projects, the compact drill's 550 in-lbs is plenty. But if you're regularly drilling into concrete, thick structural lumber, or running the drill for hours at a stretch, the full-size FUEL model earns its place in your bag.
Battery Compatibility & Runtime
One of Milwaukee®'s biggest advantages is its unified battery platform. Both compact and full-size M18™ drills run on the same M18™ REDLITHIUM™ battery system, which is compatible with over 250 tools in the M18™ lineup. That means if you already own Milwaukee® M18™ batteries, you can pick up either drill format without investing in a new battery ecosystem.
For compact drills, Milwaukee® recommends pairing with the M18™ REDLITHIUM™ 2.0Ah compact battery to keep the tool's size and weight advantage intact. Stepping up to a 4.0Ah extended-capacity pack gives you more runtime but adds weight to the grip end.
With full-size drills, the larger battery packs make more sense. The tool is already built for sustained output, and the extra capacity keeps up with that demand.
The Milwaukee® 2904-20 hammer drill driver measures 6.9" in length.
Comparing Use Cases: Compact vs Regular Drills
The compact Milwaukee® drill is the right call for overhead work, tight spaces, and jobs where you're moving around constantly. Installing light fixtures, assembling flat-pack furniture, drilling pilot holes in cabinetry, or working inside confined utility spaces are the scenarios the compact format was designed for. The reduced length and 2.3 lb weight make a real difference when your arm is extended above your head for extended periods.
Regular full-size Milwaukee® drills own the heavy-duty lane. Framing work, drilling through multiple layers of material, driving large-diameter fasteners, or any task requiring sustained torque over long periods can be handled by the full-size FUEL models without breaking a sweat. The M18 FUEL™ Hammer Drill Driver at 6.9" is the go-to when raw capability matters more than compact dimensions.
Compact vs Regular Milwaukee® Drills: Comparison Table
|
Feature |
Milwaukee® M18™ Compact Brushless Drill/Driver (3601-20) |
Milwaukee® M18 FUEL™ ½" Hammer Drill Driver (2904-20) |
|
Length |
5.7" |
6.9" |
|
Weight (tool only) |
2.3 lbs |
Heavier (full-size build) |
|
Torque |
550 in-lbs |
Higher (class-leading) |
|
Max RPM |
0–1,700 RPM |
Higher under load |
|
Motor |
Brushless |
POWERSTATE™ Brushless |
|
Battery System |
M18™ REDLITHIUM™ |
M18™ REDLITHIUM™ |
|
Best For |
Tight spaces, overhead, DIY |
Heavy-duty, masonry, job site |
|
M18™ System Compatible |
250+ tools |
250+ tools |
Get the Right Drill for Your Job at GenuineTools
GenuineTools carries authentic Milwaukee® power tools at up to 60% off MSRP.
Choosing between a Milwaukee® compact and full-size M18 drill really depends on the work in front of you. Pick compact if your day involves tight spaces, overhead tasks, and lighter fastening. Pick full-size if you need sustained torque for structural drilling, long screws, and continuous heavy use.
At GenuineTools, we stock the Milwaukee® M18 compact drill and regular hammer drill driver, all factory-sealed and backed by our 30-day money-back guarantee. If you're starting a new M18 kit or adding to one, browse our Milwaukee® drill range and order today.
Frequently Asked Questions
Is the Milwaukee® compact drill as powerful as the full-size version?
The Milwaukee® compact drill delivers 550 in-lbs of torque, which is more than enough for the majority of drilling and driving tasks around the home. Full-size M18 models offer higher sustained torque output, giving them an edge in heavy-duty, continuous-use scenarios. However, for most DIY and light trade work, the compact holds its own comfortably.
Can I use the same batteries on both the compact and regular Milwaukee® drills?
Yes, both compact and full-size Milwaukee® M18 drills are fully compatible with the entire M18 REDLITHIUM™ battery range. You can swap packs freely between tools without any compatibility issues, which makes building out an M18 kit over time a smart long-term investment.
Is the Milwaukee® compact drill good enough for professional use?
Absolutely, and many professionals choose it specifically for its size advantage. Electricians, finish carpenters, and plumbers regularly reach for compact drills when working in confined areas where a full-size drill simply doesn't fit or becomes too cumbersome to use efficiently.
What is the difference between Milwaukee® M12 and M18 compact drills?
The M12 FUEL™ compact drill runs on Milwaukee®'s 12V battery system, making it lighter and even more compact than the M18 range but with a lower overall power ceiling. The M18 compact drill offers 18V performance in a compact body, sitting between raw power and manageable size. If you already own M18 batteries, the M18 compact is the smarter buy for platform consistency.
Does GenuineTools stock Milwaukee® compact drills?
Yes. GenuineTools stocks Milwaukee®'s compact drills, including the M18 3601-20 Compact Brushless Drill/Driver. If you're picking up your first Milwaukee® drill or adding to an existing M18 kit, GenuineTools makes it straightforward to find the right model without wading through counterfeit or grey-market product.
*Note: Pricing and/or product availability mentioned in this post are subject to change. Please check the GenuineTools website for current pricing and stock information before making a purchase.