Model # 2420-21

Internet #202311908

Store SKU #186433

Store SO SKU #186433

Milwaukee M12 12-Volt Lithium-Ion Cordless HACKZALL Reciprocating Saw Kit


M12 12-Volt Lithium-Ion Cordless HACKZALL Reciprocating Saw Kit

  • Over 70+ tools compatible in the M12 system
  • Delivers up to 3,000 strokes per minute
  • Up to 40% more run-time with Red Lithium batteries
$12900 /each
store icon Loading Buying Options...
package icon Loading Buying Options...
Sorry, but we ran into issues loading these options. Please try refreshing.

Frequently Bought Together

Product Overview

The Milwaukee 2420-21 M12 REDLITHIUM Cordless HACKZALL Reciprocating Saw Kit includes: (1) M12 REDLITHIUM 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 reciprocating 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 1.5Ah (48-11-2401), compact 2.0Ah (48-11-2420), extra capacity 3.0Ah (48-11-2402), extended capacity 4.0Ah (48-11-2440)
  • Compatible chargers: M12/M18 multi-voltage (48-59-1812), M12 AC/DC (2510-20), M12 30 minute (48-59-2401)
  • Note: Product may vary by store
  • Click here for more information on Electronic Recycling Programs

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents.  Download a free copy from the Adobe Web site.

Customers Also Compared These

$99.00 /each
$129.00 /each
$139.00 /each
$169.00 /each
Name M18 18-Volt Lithium-Ion Cordless Hackzall Reciprocating Saw (Tool-Only) M12 12-Volt Lithium-Ion Cordless HACKZALL Reciprocating Saw Kit M12 FUEL 12-Volt Lithium-Ion Cordless HACKZALL Reciprocating Saw (Tool Only) M12 FUEL 12-Volt Lithium-Ion Cordless HACKZALL Reciprocating Saw Kit
Brand Milwaukee Milwaukee Milwaukee Milwaukee
Ratings (125) (197) (32) (31)
Length Of Stroke 3/4 in .5 in .625 .625
Batteries Included No Yes No Yes
Power Tool Features No Additional Features,No Tool Blade Change,Variable Speed Bag Included No Additional Features Bag Included
Cordless/ Corded Cordless Cordless Cordless Cordless
Number of Batteries Included 0 1 0.0 1
Voltage (volts) 18 12 12 12
View Product View Product View Product View Product



Product Depth (in.)
11 in
Product Height (in.)
6 in
Product Width (in.)
2.75 in


Batteries Included
Battery Amp Hours
Battery Power Type
Lithium Ion
Battery Size
Lithium Ion
Charger Included
Color Family
Cordless Tool Type
Reciprocating Saw
Cordless/ Corded
Dust Collection
Keyless/keyed blade change
Length Of Stroke
.5 in
Number of Batteries Included
Power Tool Features
Bag Included
Product Weight (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

More Products With These Features


Customer Questions & Answers

Will this saw work as a tree pruner when a clipper pruner is not strong enough ??

Asked by: Anonymous
It will work sufficiently, though less than ideal. Using the proper blade will help.
Answered by: Grogan14
Date published: 2016-01-04

Does the recharger come with this item?

Asked by: Anonymous
Yes, it is listed as included under the product overview.
Answered by: Grogan14
Date published: 2017-03-28

1 or 2 batteries?

Asked by: Anonymous
Not sure what your question is. The saw comes with 1 (one) battery. I would recommend buying an extra battery and having it charged before your start a job.
Answered by: snifferpro
Date published: 2016-03-16

Will this accept standard Sawzall blades?

I have the standard Sawmill. Will this take the same blades?
Asked by: Joe
Yes, although longer blades cutting through thicker wood products can cause more friction. The motor torques through it all right, but battery life is cut short. I've used a 9-in blade which ran the battery out fairly quickly.
Answered by: RichJester
Date published: 2017-04-29
  • y_2017, m_8, d_18, h_8CST
  • bvseo_bulk, prod_bvqa, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_12
  • loc_, sid_202311908, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=BEST_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=POSITIVE_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 100ms

Customer Reviews

M12 12-Volt Lithium-Ion Cordless HACKZALL Reciprocating Saw Kit is rated 4.3 out of 5 by 195.
Rated 3 out of 5 by from Save your money for the 18 volt. I suppose if you are cutting plastic or drywall this will do th... Save your money for the 18 volt. I suppose if you are cutting plastic or drywall this will do the job but for metal rods or wood you better bring a lunch because you are going to be there all day. I have other Milwaukee cordless tools that are 18 volt and they run like a charm, I couldn't be happier. I thought for the few small jobs I have this would do the trick and I like that it's lighter than the larger model. No. Get the larger powered model.
Date published: 2017-04-22
Rated 1 out of 5 by from Terrible Warranty and Repair I bought this product 4 - 6 years ago. It worked great until it stopped working. I was planning on buying a new one, but talked to a Milwaulkee rep at a Home Depot in Atlanta and they told me to send it for repair. I've always been an avid Milwaulkee fan, but it turns out their service department is terrible. I sent back my Hackzall for service. Several weeks later I finally heard from the service department. I wasn't surprised learn that it was out of warranty, especially since I didnt save the receipt. However, the cost of repair was almost as much as replacing the saw. This notification was through email with little detail. I called the service department, and there was nothing they could to help so I asked them to return the saw. They gladly sent it back, BUT IN PIECES! I'm highly frustrated and unhappy with this service, and will be slowly moving my business to Rigid based on their warranty. This was the worst service experience I have ever had. (Excuse the grammar, terrible phone typer)
Date published: 2017-04-11
Rated 2 out of 5 by from Not a fan, go through about 2-3 a year.Hard to... Not a fan, go through about 2-3 a year.Hard to cut straight.
Date published: 2017-04-23
Rated 5 out of 5 by from Small, light, and easy to use. Would recommend. I really like how small and light this thing is for jobs around the house. Much easier to grab than my big corded sawzall for small projects. The battery doesn't last long enough for big jobs, but with a spare you shouldn't have a problem. I have used it to cut wood, metal, plastic, and drywall over the past year and a half. It works great on everything so far. I have the soft bag case for it and the 3/8 drill/driver, but wish there were an option for a hard case for storage.
Date published: 2017-07-11
Rated 5 out of 5 by from Powerful and Perfect size for tight space cuts Bought this little hackzall to complete a quick job that dropped in my lap. Had to cut some solid cabinet wood trim pieces allow for an appliance to fit. It was the perfect size and powerful enough to get in the tight space to accomplish the task. Love Milwaukee M12 tool system.
Date published: 2017-07-18
Rated 5 out of 5 by from 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.
Date published: 2012-04-22
Rated 5 out of 5 by from First hacksaw that I've owned. Used it so far to... First hacksaw that I've owned. Used it so far to cut tree limbs and works great. Love that it's battery operated, the battery last a long time and the recharge time is around 15 minutes!
Date published: 2017-05-15
Rated 5 out of 5 by from Great item Beside the fair bit of chatter that you can get from every hacksaw, this tool cuts great, has a decent run time, and is fairly portable.
Date published: 2017-08-01
  • y_2017, m_8, d_18, h_15
  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_195
  • loc_, sid_202311908, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 196ms