Model#: MILN2457-21

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Brand new items;Full manufacturer warranty available
Manufacturer inspected, repaired and tested items; CPO 120 day money back guarantee
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New or Recon items with possible minor cosmetic damage; CPO 120 day money back guarantee
Returned items inspected, repaired and tested by CPO technicians; CPO 60 day money back guarantee

Milwaukee 2457-21 M12 12V Cordless Lithium-Ion 3/8 in. Ratchet Kit

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Product Overview


The Milwaukee 3/8 in. Cordless M12 Lithium-Ion Ratchet features best in class power, speed, and durability in a small yet powerful package. Its durable motor provides 35 ft-lbs. of torque at 250 RPM to handle most jobs with ease, and its compact design gives the user better maneuverability in smaller, tighter work spaces. A metal variable speed trigger gives the user precise speed control for any application, and since it's powered by Milwaukee's REDLITHIUM technology, it also runs with a longer lifespan for more use and less charging. It's built with reinforced housing for extra durability, and also comes equipped with a built-in LED to light dimly lit work areas and a built-in battery fuel gauge that displays the remaining run time.
  • Compact yet powerful design delivers 35 ft-lbs. of torque at 250 RPM.
  • 3/4 in. low profile head allows for easier use in tight spaces
  • Lightweight for easy maneuverability
  • Reinforced housing for maximum durability
  • Variable speed metal trigger gives the user precise speed control
  • On-board fuel gauge displays remaining run time
  • Built-in LED light allows for work in dimly lit areas
  • M12 3/8 in. Cordless Lithium-Ion Ratchet - 2457-21
  • 3/8 in. to 1/4 in. Adapter
  • 12V M12 RedLithium Battery
  • Charger


Series: M12
Cordless: Yes
Anvil Size: 3/8 in.
Batteries Included: 1
Battery Amp Hours: 1.5 Ah
Battery Type: Li-Ion
Drive Size: 3/4 in.
Operating Speed (RPM): 0 - 250
Switch Type: Variable
Torque: 35 ft-lbs.
Voltage: 12V



4.6 / 5.0
107 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Yes, I would recommend this to a friend (99)
No, I would not recommend this to a friend (3)
Easy To Use (98)
Powerful (40)
Lightweight (3)
Value (2)
Heavy (1)
Best Uses
Home Repair (35)
Frequent Use (3)
Small Projects (3)
Heavy Duty Requirements (2)
very handy
im a professional mechanic, i have a 1/4 drive snap on cordless ratchet i use alot, i wanted a 3/8 drive version but snapon replaced theres with this.
i figured its rated at 35 ft/lbs so it should be more powerfull ........ but its not...
it is lighter, more compact , has a higher free spin speed, and the battery charges faster/ lasts longer
September 11, 2012
Originally posted at
Works Great!
Works great! I have been beating this thing up, it has not let me down yet.
August 18, 2012
Originally posted at
Yes, I would recommend this to a friend
Easy To Use
What a wrist saver!
Great tool from Milwaukee. Purchased to replace my dead power ratchet from skil that lasted 3 years and did the job of saving me from carpel tunnel, but this new one is twice the unit!
1) more power, and who wouldn't want that
2) removable, replaceable battery (the skil sould still more if they had incorporated that feature!)
3) lithium, so it can sit fo r months and still be ready to rock.
BUT- remember, this is a ratchet to end the repitition of running bolts down, it will not torque them, that's YOUR job, you do it manually with the same ratchet. When the bolt gets a bit tight, it stops and you finish the tighten-up.

Great product, fair price from my fiends at CPO!
April 20, 2012
Yes, I would recommend this to a friend
Easy To Use
Excellent tool
Another great product from Milwaukee.
March 8, 2014
Yes, I would recommend this to a friend
Easy To Use
Shouldn't have waited so long!
Did my homework prior to this purchase. Fuel is the way to go.Was ready to buy the yellow guy until I reviewed the M12 / M18 Fuel products. This product will be used and put to the test everyday with my job.Cut the work time considerably....bought the 3/8 rachet,
1/4" brushless impact and 3/8" brushless impact. After I purchased, I looked around my shop and realized pretty much all my reliable tools are Milwaukee.
March 10, 2014
Yes, I would recommend this to a friend
Easy To Use
Best Uses
Home Repair
My new go-to 3/8 ratchet
All of my cordless power tools are Milwaukee. I have their m18 series....1/2 impact, 3/8 impact, 1/4 hex impact, hammer drill, sawzall, work light, etc. etc and so on. I love all of their power tools and wouldn't even think about purchasing anything other than Milwuakee.
When I got this ratchet I was surprised at how light it was. This tool is WAY lighter than my pneumatics. The LED light shines bright and seems to be focused on the work area. The head on this unit is half the size of my pneumatic 3/8's which is AWESOME! I charged the battery and put it to the test. This ratchet does seem to be a little underpowerd with INITIAL torque but did everthing I needed it to do. Using a calibrated torqe wrench I established the break away torque at around 12 ft lbs. Putting it against every pneumatic 3/8 ratchet I have EVERY one of my pneumatics...including a cheap $25 unit seem to have much more break away torque than this has. However, once it starts spinning it seems to have almost as much as even my better pneumatics. The reality is you manually break tight bolts free even with the pneumatics. After all...this is a ratchet not an impact. I did the front breaks on my car and changed a friends alternator and this little unit worked like a champ. One thing I would like to mention is the charger will not show green when the battery is charged. The red light will go out but I have to push on the battery to make the charger show green. I will glady trade the slight lack of initial torque for the convenience and ease of use any day of the week. This is now my go-to 3/8 ratchet.
January 28, 2012
Replaces an air tool, but big
I use this for basic, low torque bolts you come across with car maint. I wish it was as compact as the air ratchet I use. The battery life and power makes it convenient, but not as versatile as a compact air ratchet.
February 22, 2012
Originally posted at
Yes, I would recommend this to a friend
Easy To Use
Super impressed
I'm a technician for a Mercedes Benz dealer and use this thing everyday. It's making me lots of money. So nice to not be held up by the air hoses.
September 22, 2012
Yes, I would recommend this to a friend
Easy To Use
Best Uses
Home Repair
Save your ears... No compressor!
works great don't need to drag air hoses or compressor around. portable can use in the shop garage or the field. Milwaukee also offers a lot of battery compatiable tools. I have the grease gun that also works very well. The entire M 12 series seems to be light weight and portable.
January 4, 2013
Yes, I would recommend this to a friend
Easy To Use
Best Uses
Home Repair
Excellent product.
Very powerful for a battery tool. Well balanced. Long battery life. Nice slim design. Only feature I would ask is for a pivoting head.
March 2, 2013

Questions & Answers

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Browse 9 questions Browse 9 questions and 13 answers
Is the battery on this tool the 2.0 lithium-Ion technology version?
Dennis on Aug 12, 2015
BEST ANSWER: The battery included is the M12™ REDLITHIUM™ Battery (48-11-2401).
Can it be used as a ratchet ?
A shopper on Feb 4, 2017
BEST ANSWER: I only use the tool with a battery . the tool works just like an air ratchet with out the air which I normally pull on after it stops to make sure either the bolt or nut is tight
does it have charger
for the battery?
ariel on Dec 15, 2013
BEST ANSWER: Yes, the charger and battery are included in the kit.
does this come with a case
Dave on Apr 14, 2013
BEST ANSWER: No, a case is not included with this ratchet kit.
Does It co.e with battery &charger
Dan on Jun 14, 2014
BEST ANSWER: Here is a list of everything that is included with this item:

3/8-in Cordless M12 Lithium-Ion Ratchet - 2457-21
3/8-in to 1/4-in Adapter
12V M12 RedLithium Battery
how long is the 3/8 Cordless ratchet (end to end)?
Also could you tell me how long the 1/4" Cordless Ratchet is?

Thank you...
Hal on Mar 31, 2014
BEST ANSWER: The tool is 10-7/8" long including the battery. The 1/4" ratchet is 1" long.
Hello, can you tell me if you can ship to the uk , if yes how much. Thanks Dave
Dave on Feb 10, 2014
BEST ANSWER: Currently we do not ship to the UK.
Is the battery 2.0?
JBo on Dec 31, 2013
BEST ANSWER: The battery that is included is an 1.5Ah rated battery.
Does this kit come with a case?
Dennis O on May 4, 2017

New Vs. Reconditioned

What's the difference between New and Factory-Reconditioned?

Factory-Reconditioned products have been returned to the manufacturer and are restored to like-new operating condition; they go through a rigorous testing and inspection process. Plus, they offer a significant savings vs. new.
  • Reconditioned products may have minor cosmetic blemishes or scratches that do not affect item performance.
  • Reconditioned products may not come with all of the consumables the new version comes with (bits, sanding pads/papers, cases, etc.).
  • Both come with a manufacturer warranty and are covered by our Money Back Guarantee; New is 30 days, Reconditioned is 120 days.
Condition: New Factory Reconditioned
Features: Same Same
Specs: Same Same
Includes: M12 3/8 in. Cordless Lithium-Ion Ratchet - 2457-21,
3/8 in. to 1/4 in. Adapter,
12V M12 RedLithium Battery,
M12 3/8 in. Cordless Lithium-Ion Ratchet Kit - 2457-81,
3/8 in. to 1/4 in. Adapter,
Availability: In Stock Out of Stock
Warranty: 5 Year Limited 1 Year Limited


The Milwaukee Warranty Every MILWAUKEE power tool is tested before leaving the factory and is warranted to be free from defects in material and workmanship. MILWAUKEE will repair or replace (at MILWAUKEE's discretion), without charge, any tool (including battery chargers) which examination proves to be defective in material or workmanship from five (5) years after the date of purchase. Return the tool and a copy of the purchase receipt or other proof of purchase to a MILWAUKEE factory Service/Sales Support Branch location or MILWAUKEE Authorized Service Station, freight prepaid and insured. This warranty does not cover damage from repairs made or attempted by other than MILWAUKEE authorized personnel, abuse, normal wear and tear, lack of maintenance, or accidents.

The warranty period for V28, M12 and M18 Li-Ion Battery Packs is two (2) years from the date of purchase. XC M18 Battery packs carry a (3) year warranty. The warranty period for Ni-Cd Battery Packs, Flashlights, Radios, and Professional Hoists (lever, chain, and electric) is one (1) year from the date of purchase.

*The warranty period for Portable Generators is two (2) years from the date of purchase.



This warranty gives you specific legal rights. You may also have other rights that vary from state to state and province to province. In those states that do not allow the exclusion of implied warranties or limitation of incidental or consequential damages, the above limitations or exclusions may not apply to you. This warranty applies to the United States, Canada, and Mexico only.

Please call Milwaukee Electric Tool Corporation for warranty questions at 800-729-3878