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Internet # 325480442

Model # 3650-21P

Store SKU # 1009698648

M18 18-Volt Lithium-Ion Compact Brushless Cordless 1/4 in. Impact Driver Kit with One 2.0 Ah Battery, Charger & Tool Bag

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  • Compact size while being lightweight and portable
  • The brushless motor delivers 1,700 in-lbs of torque and 3600 RPMs
  • Variable speed trigger control reduces damage to the tool
  • View More Details
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Product Details

About This Product

The MILWAUKEE® M18™ Compact Brushless ¼” Hex Impact Driver is more compact with faster driving speeds. Measuring only 4.4" in length and 2.1" in width, the compact size allows for better access in tight spaces while being lightweight and portable. The brushless motor technology provides 1,700 in-lbs of torque and up to 3600 RPMs for faster speed and increased productivity. MILWAUKEE® REDLINK™ Intelligence optimizes the way the M18™ REDLITHIUM™ batteries work with the impact driver for best-in-class performance. Premium components and an all-metal gear case provide the durability that professionals require. This hammer drill kit includes (1) MILWAUKEE® M18™ REDLITHIUM™ CP2.0 Battery, (1) MILWAUKEE® M12™/M18™ Multivolt Charger, (1) Contractor Bag. The Compact Brushless ¼” Hex Impact Driver is part of the MILWAUKEE® M18™ system, fully compatible with over 250+ solutions.


  • Compact size allows for unrivaled access in tight spaces
  • Brushless Motor delivers the power to quickly complete most common applications
  • Enhanced variable speed trigger control helps reduce damage to fastener and material
  • Professional Durability with all metal gearcase and gears
  • 0-3600 RPMs
  • 1,700 in-lbs. of Peak Torque
  • 4.4" in Length and 2.1" in Width
  • 2.6 lbs with kitted battery
  • 5 year tool warranty, 2 year battery
  • Compatable with 250+ solutions
  • Includes: M18 Compact Brushless 1/4" Hex Impact Driver (3650-20), (1) M18™ REDLITHIUM™ CP2.0 Battery Pack (48-11-1820), M18/M12 Multi-Volt Charger (48-59-1812), Contractor Bag
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  • Return Policy

Product Information

Internet # 325480442

Model # 3650-21P

Store SKU # 1009698648

Additional Resources

Shop All Milwaukee


Dimensions: H 7.7 in, W 2.1 in, D 4.4 in


Product Depth (in.)

4.4 in

Product Height (in.)

7.7 in

Product Width (in.)

2.1 in


Battery Amp Hours

2 Ah

Battery Power Type

Lithium Ion

Battery Voltage (V)


Blows per Minute (BPM)


Charger Included

Charger Included

Color Family




Cordless Tool Type

Impact Driver



Drill/ Driver Type

Impact Driver

Drive Size

1/4 In. Hex


Tool Bag

Maximum Speed (RPM)

3600 RPM

Motor Type


Number of Total Batteries Included


Power Tool Features

Compact, LED Light, Sub-Compact

Product Weight (lb.)

1.7 lb



Tools Product Type

Power Tool

Torque (In-Lbs)


Warranty / Certifications

Certifications and Listings

UL Listed

Manufacturer Warranty

5 year tool warranty, 2 year battery

Questions & Answers

Q:What’s the manufacturer warranty on this product?
by|Apr 16, 2024
1 Answer
Answer This Question

A:  Hi Driv! The M18 Cordless Impact Driver has a 5-year warranty. You can copy and paste this link into your browser for more information on warranty > https://www.milwaukeetool.com/Support/Registration-and-Warranty - Milwaukee Tool Social Team

by|Apr 17, 2024
    Q:What is the model number of this product
    by|Mar 10, 2024
    1 Answer
    Answer This Question

    A:  Hi Mark, the model number is 3650-22CT. - Milwaukee Tool Social Team

    by|Mar 11, 2024
      Q:Can you carry this onto an airplane or would you need to check it?
      by|Feb 1, 2024
      0 Answer
      Answer This Question
      Q:Does it have the LED light above the trigger?
      by|Jan 24, 2024
      1 Answer
      Answer This Question

      A:  It does have an LED worklight above the trigger. - Milwaukee Tool, Social Team

      by|Jan 27, 2024
        Showing 1-4 of 21

        Customer Reviews

        4.6 out of 5

        • 4.6 out of 716 reviews
        • 73% recommend this product
        Filter by:
        Showing 1-10 of 716 reviews
        Super Compact, Torquey
        Ok I have several impact drivers, but this has a SUPER compact head, significantly smaller than even the previous version Milwaukee. It still has tons of torque - when you squeeze the trigger, you can feel it twist the whole tool (like a muscle car). The head (minus bit) is less than 4-1/2 long and fits in tight spaces. With a short bit and no holder, you could manage a 5 inch space. This model is trigger-only speed control, and the control is very good, allowing everything from 'barely moving' to full speed. I can use it at slow speed to start screws without having to use a manual driver first. The light is well placed, and actually useful; it illuminates the fastener almost up to the point of bit contact. The included bag has tons of room, you can fit multiple tools or other accessories - extra batteries, bit sets, etc. This is definitely the best compact driver Milwaukee has made so far.
        • Recommended
        Small but mighty!
        Great tool with tons of power. The subcompact fits in tighter spaces and well outperfomers my older yellow/black brand. The LED light works well in darker spacea and the light weight reduces the fatigue in my hand. This impact made easy work of installing new framing and did not overheat at all. I use it in combination with my Milwaukee drill/driver and its without a doubt a winning combo.
        • Recommended
        It’s my favorite tool!
        Let me just say right off the bat that I am so impressed with my new driver! When I first tried to insert a bit I was confused why it didn’t fit then was tickled that I didn’t notice the hex size. That’s okay though. It just gave me the perfect opportunity to go out and buy a new Milwaukee 1/4 driver bit packout set, which is also impressive. I have drill drivers but this is my first hex impact driver. I am super pleased with the size. I recall buying a pretty expensive cordless nail gun but it was so bulky that I would quickly get hand fatigue, so stopped using it and bought a smaller one. This compact size is just right for my hand, even with the battery. I did have to watch a video on how to insert the bit. Silly me was trying to twist the collet! After seeing how easy it is I couldn’t wait to complete installing iron balusters on my stairs using the screw method. Love the quiet operation, how easy it is to insert and remove bits, the LED light, convenient rubber grip handle, the easily accessible forward/reverse switch, and the brushless motor. Also has a tool lanyard and belt clip, which certainly comes in handy. Very easy to hand from a ladder with clip holder. I also added hooks to my scaffold so I can hang tools from it so I certainly like this feature. I used to constantly switch to shorter bolts when I actually needed longer ones because I didn’t have the right tool, but now I do and I couldn’t be more pleased with this lightweight Milwaukee compact impact driver, along with the M12 and M18 dual battery charger and well as the convenient batteries. I first used it while working on my stairs and along with my awesome new hex kit, this Milwaukee hex impact driver is a game changer for me and is now my favorite tool!
        • Recommended
        High quality, compact, and tough
        When you grab this Milwaukee Compact ¼” Impact Driver in your hand you will hardly believe this has 1700 in-lbs. of torque but it does! My observations: • I like the small size. This is perfect for around the house, at the job, or in the toolbox in your truck. It’s so small and lightweight it will take up little space. • Even with the small size I can get a perfect grip on the tool, and I can easily control even with a significant load. • The LED light is aimed well and has plenty of lumens. • This is brushless, which will help with the efficiency and longevity of the tool. Also, more energy efficient with the batteries. • This kit is a great buy since it comes with the impact driver, two 2Ah batteries, a dual charger (12V and 18V) and a nicely made bag that you can use for storage of this kit or plenty of other uses. • I compared this to an older Milwaukee impact (non-Fuel) I could not believe the difference. This was close to ½ the size of the older impact driver, but this small version was significantly more powerful and easier to handle. • I tested this using the included 2Ah batteries and that is the perfect mate for these drills. Mostly because it again keeps the weight low and the footprint small. • This drill has no speed or torque adjustments other than the trigger pressure you apply. I found it simple to get the right speed and torque. • All metal gearcase and gears as you would from Milwaukee • Under significant load it will get loud as you would expect from a compact impact driver. This is a great little impact driver that will absolutely stun you with the size and power this can produce. Yes, there are impacts that will provide more torque, but they are almost double the weight and size. If you want a super lightweight or compact impact driver, I don’t think you can do any better than this one. I recommend it.
        • Recommended
        Compact and powerful impact driver
        The Milwaukee M18 18-volt lithium-ion compact brushless 1/4 in. impact driver (up to 3600 RPMs) is very compact and powerful (1700 in-lbs. of peak torque). Easily drives 4-inch coarse exterior screws. The impact driver is very lightweight less than 2 lbs. It is amazing how much power fits in something so compact. The LED light helps when working in tight places. It has a removal belt clip and can be used with a tool lanyard. Great addition to my tool collection.
        • Recommended
        Powerful, Compact and Light!
        I've had brushed M18 impact for a decade, its has served me well and continues to do so. While working on projects with my son, I realized that fighting over tools with him is no fun. Thankfully Santa had this for me! The brushless is faster with more torque than my brushed one, still re-calibrating my trigger finger so screws don't end up count sunk! Buy it, you will love it! Many people say to only buy the "Fuel" brushless, but for a DIY'er like me this is absolutely great!
          • Recommended
          Compact but powerful
          This Milwaukee M18 18V ¼ Impact Driver kit is quite impressive. The tool itself fits nicely in the hand and the battery gives a nice balanced feel. I was surprised at the feel of the torque the first time I squeezed the trigger. The compact size allows for doing tough work in small spaces. Having two batteries is nice but each one seems to have a long use life; and quick charge time. The LED light on the tool is a big plus to light up your work area. The charger is designed to charge the included 18V batteries and has charging station for other Milwaukee 12V batteries. The charging status is clearly visible on the charger and the battery. When the battery is on the tool, you can see how much charge is left. The charger plug cord is pretty long allowing for placement flexibility. The handy belt hook can be moved to the other side depending on which hand is used the most. And to top it all off, it comes in handy carrying bag with plenty of space.
          • Recommended
          1 found this review helpful
          Love This Driver Kit !
          I really liked the 20 volt 1/4 inch driver that I have been using for years, but now that I got and used the new Milwaukee M18 Compact Brushless 1/4 inch Hex Impact Driver Kit, the old 20 volt set will be a back up from now on. This little driver is perfect in many ways, it is lite weight, very well balanced with the 2.0 ah battery, fits my hand great and has plenty of power. The 2.0 battery last as long as I will ever need it too and it comes with a check power light bar on the front of the battery, so I can see how much battery power it has left. As for the battery charger, it is sweet, it comes with a second charging spot that you can charge M12 batteries too ! I do have M12 batteries, so this will come in very handy. It will charge your M18 battery first, then switch over to the M12 and charge it. The Milwaukee tool bag is very nice, it has plenty of room for the driver kit and charger and all of the driver bits that I want to put in there. The brushless motor has plenty of power to drive in 3 inch screws and runs really quiet doing so. I am sure it will last a long time, it comes with a 5 year warranty and a 2 year battery warranty. This is one sweet driver that I highly recommend !
          • Recommended
          2 found this review helpful
          Nice compact impact driver kit
          The Milwaukee M18 18-volt lithium-ion compact brushless cordless 1/4 in. impact driver kit comes with an impact driver, one 2.0 Ah battery, a M12/M18 charger, and a tool bag. The impact driver is very compact and powerful (1700 in-lbs. of peak torque). Easily drives 4-inch exterior screws. The 2 Ah battery is a great paring in this kit. The battery provides plenty of power but together with the impact driver it is lightweight and compact. The LED light helps when you working in tight places. It has a removal belt clip.
          • Recommended
          3 found this review helpful
          CP2.0 battery’s seem to to work well for their size…...
          CP2.0 battery’s seem to to work well for their size…
          • Verified Purchase
          1 found this review helpful
          Showing 1-10 of 716 reviews

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