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Model # 2420-21

Internet # 202311908

Store SKU # 186433

M12 12-Volt Lithium-Ion Cordless Hackzall Reciprocating Saw 1-Battery Kit

This item has been discontinued.
The Home Depot no longer carries this specific product.

Was  $139.00
$99.00 /each

Save $40.00 (29%)



Model # 2420-21

Internet # 202311908

Store SKU # 186433

Store SO SKU # 186433

The Milwaukee 2420-21 M12 Red Lithium Cordless Hackzall Reciprocating Saw Kit includes: (1) M12 Red Lithium Battery, (2) Hackzall TM Blades (1)M12 charger and (1) Contractor Bag for powerful cutting on the go. The saw's variable 0 - 3000 strokes per minute (SPM) helps you make fast, precise cuts through a wide range of materials, including drywall, wood and PVC, and at 11 in. and 2.6 lbs., its compact and lightweight design gives you control and versatility in tight spaces. The variable speed trigger helps you achieve a controlled cut, while the QUIK-LOK blade clamp offers fast and easy blade changes. Cordless tools powered by REDLITHIUM batteries deliver more torque, more power and longer run time than the competition.

  • Only 11 in. and 2.6 lbs. for cutting in tight spaces
  • 12-volt REDLITHIUM battery offers longer run time and lighter weight
  • Keyless QUIK-LOK blade clamp allows for quick and easy blade changes
  • All-metal gear case for added durability
  • Variable speed trigger for increased user control
  • Battery fuel gauge displays remaining run time
  • Accepts both HACKZALL and SAWZALL style blades (See related products for listing of Hackzall blades)
  • Built-In LED light illuminates work surface
  • Includes: (1) 2420-20 Hackzall M12 Cordless Lithium-ion recip saw, (1) 48-11-2401 M12 REDLITHIUM battery, (1) 48-59-2401 M12 lithium-ion battery charger, (1) contractor bag
  • REDLITHIUM productivity advantage: 40% more run time, 20% more speed, 20% more torque, fade free power durability, operates down to 0/-18, runs 20% cooler, up to 50% more recharges, no memory effect
  • Compatible batteries: compact 1.5 Ah(48-11-2401), compact 2.0 Ah (48-11-2420), extra capacity 3.0 Ah (48-11-2402), extended capacity 4.0 Ah (48-11-2440)
  • Compatible chargers: M12/M18 multi-voltage (48-59-1812), M12 AC/DC (2510-20), M12 30 Min. (48-59-2401)
  • Note: Product may vary by store
  • Note: Product may vary by store
  • Home Depot Protection Plan:

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Info & Guides

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Product Depth (in.) 
11 in 
Product Height (in.) 
6 in 
Product Width (in.) 
2.75 in 
Adjustable Shoe 
Batteries Included 
Battery Power Type 
Lithium Ion 
Battery Size 
Lithium Ion 
Charger Included 
Color Family 
Cordless Tool Type 
Reciprocating Saw 
Dust Collection 
Keyless/keyed blade change 
Length Of Stroke 
.5 in 
Power Tool Product Type 
Product Weight (lb.) 
2.62 lb 
Strokes per minute 
Tools Product Type 
Power Tool 
Variable Speed 
Voltage (volts) 
Warranty / Certifications
Certifications and Listings 
1-UL Listed,CSA Listed,ETL Listed 
Manufacturer Warranty 
5 Year Limited Tool Warranty 2 Year Limited Battery 


Rated 4.3 out of 5 by 98 reviewers.
Rated 5.0 out of 5.0 by a must have for small jobs. I am a maintenance technician at a large apartment complex so I use this tool quite often. Since I am the only person on the crew with one it gets borrowed by the other 3 guys quite often. I have to make sure they know to let me know when they borrow it since they know where I keep it and just tend to grab it when they need it. It's great for cutting things like rusted toilet tank bolts, drywall, pipes and small lumber. My full sized reciprocating saw was to big to keep in my golf cart so I always had to go to the shop and get it this stays in the cart with me so I haven't used my full sized reciprocating saw since I bought this one last year. April 12, 2015
Rated 5.0 out of 5.0 by What a solid little saw! I'm an electrical apprentice and just started working with a commercial/solar company. They recommended that I buy a sawzall for doing quick cuts on EMT and rigid conduit. I was a little tight on cash and needed something to get me by. The Milwaukee M12 Hackzall jumped out to me right away. I already owned their M12 impact driver and hammer drill/drill combo (also phenomenal products) so all the batteries and chargers I had would be interchangeable. The battery it comes with does alright, but do yourself a favor and pick up one of the M12 extended capacity batteries or the 4.0 Red Lithium and some 6" blades. They'll get you way more cuts per charge and allow you to get some more leverage when you're cutting. The difference is huge. I'm incredibly impressed with what this little saw offers and would recommend it to anyone, apprentice to master. Way to go Milwaukee! June 5, 2015
Rated 5.0 out of 5.0 by This is a great saw to have . I have been looking at This Milwaukee Cordless hackzall for a few months now, when ever I went into Home Depot & I finally bought one. This is a great saw for cutting pipes, boards, Tree limbs etc. It is small enough to fit in areas that a Sawzall wouldn't & a lot easier to handle. This tool is a favorite of mine using it to saw anything it is easy to carry with with & the battiery lasts a long time. If you're even thinking about buying this hackzall, it will help you to finish jobs a lot faster then if you wear to use a regular saw, you will love having this saw it will be great to add this with the rest of your tool's. April 22, 2012
Rated 4.0 out of 5.0 by Did the job This saw was purchased to remove grout from a large floor. It did the job although it was difficult to handle and did get out of control sometimes and ruined a number of tiles. But it was much better than doing it by hand. July 22, 2015
Rated 4.0 out of 5.0 by Met Expectations If you've ever used a full sized reciprocating saw, and thought it had plenty of power but it was big and clunky, this tool is for you. One handed operation is a huge plus over a regular recip saw. This tool is well balanced and comfortable to use one handed, even for extended periods. In terms of power, watch your technique. Being lighter weight, this tool is more likely to bind than a full size recip saw, with the saw moving instead of the blade. Once I got used to it, it delivered the performance I expected. It's not as fast as a full size recip saw, but doesn't quit either. Batteries don't last long during heavy use. I picked up two of the XC 3 AH battery packs, and one of those was wiped out by about 25 minutes of brush cutting. The included standard size battery would have been toast in under 15 minutes. You can use the batteries faster than you can charge them with this tool. That's not true of my drill and impact driver. I like the XC batteries with this tool, I think they balance better than the standard batteries. I don't notice the extra weight of the larger battery like I do with the XC batteries on my drill and impact driver. Also, I don't like the included bag. The bag doesn't hold blades or batteries in an organized way, the two obvious things you would put in this bag. I'm happy with this product, and think many folks will be too, if they're willing to invest in spare batteries. May 20, 2015
Rated 5.0 out of 5.0 by 5year warrantee on saw and 3 year on the 4.0 battery sold me Purchased to cut small limbs and saplings, very light and have a free hand to grab limbs. Bought the 9" DIABLO BLADES ( looks like a bow saw blade) I found that using a sawing motion while running this saw makes it cut faster also purchased the 4.0 xc battery to give the saw xtra life works great. Need more power buy a chain saw but this saw is no joke. Perfect for what I'm doing and the other tools that can use this same batteries is worth checking out. I almost purchased a big, heavy and two handed reciprocating but thought about what I was going to use this for and went with the smaller lighter one. HD beat amazon on price for saw and batteries. November 3, 2013
Rated 5.0 out of 5.0 by Excellent For Portable Cordless Reciprocating Saw... I've been a Plumbing Contractor for over 20 years and I can confidently recommend this Milwaukee product to anyone that has a light duty project. It's perfect for cutting plastic DWV (drain, waste, & vent) pipe, water closet bolts (toilet bolts), copper that's not full of water, and other cutting applications that don't require more power and a longer cutting stroke. This is NOT a 120 volt, 11+ amp reciprocating saw, so don't expect it to handle or be the proper saw for demo work, trimming hedges, pruning trees, etc. Period! If you're going to trim hedges, purchase a hedge trimmer and if you're going to prune trees, purchase a chain saw or pole trimmer.. I fail to understand all of the negative reviews this tool is getting by various reviewers. For those of you that complain about the tool seizing up or completely dying when you get water into it, I'll say this: "Read your Operators Manual. It clearly warns the operator not to allow water into the tool." This warning can be found under the Maintenance Section on page 6. I tend to agree that the battery included in this kit isn't the best one for this tool, but you can always purchase the 3.0 or 4.0 XC 12-volt battery or purchase the 18-volt version of this saw. The bottom line is: this is an affordable, durable, well-made tool that's lightweight and easy to use and handle and should provide years of dependable service if it's used as intended and properly maintained by whoever owns it. March 2, 2014
Rated 5.0 out of 5.0 by Best small saw I've ever owned. This great little saw cuts through anything. It is not a replacement for a Sawzall reciprocating saw, but it handles medium and small jobs without the bother of a cord and with surprising strength and staying power. The batter lasts longer than other similar 12V batteries and provides good power right up to the end. The saw has meter lights that show how much battery is left each time you use it. It also has an LED light that shines on the cutting area. This lights up the dark corners when I have to stand between my light source and my work. Great tool. June 9, 2015
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