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A good 3/8-inch drive setup covers most jobs around a home garage: oil changes, brake pads, lawn mower blades, bike racks, and the flat-pack desk that needs tightening every few months. With Milwaukee, the first decision is whether you want a cordless M12 ratchet that spins fasteners for you or a manual ratchet and socket set that fits in a drawer and needs no charging. After that, it comes down to SAE versus metric, how many sockets you need, and whether any of them will see impact use.
According to the listings, this Milwaukee range falls into three groups. Two cordless M12 ratchet kits, the 2457-21 and the M12 FUEL high speed model, run on 12-volt batteries and include batteries and chargers but no sockets. Three manual mechanics sets, the 48-22-9482 metric set, the 48-22-9481 SAE set and a 56-piece SAE and metric set, pair a 90-tooth style ratchet with sockets and storage. The 43-piece SHOCKWAVE set is made up of impact-duty deep sockets for use with power tools.
Milwaukee 3/8 Ratchet Set Lineup at a Glance
| Model | Type | Sizes | What is included |
|---|---|---|---|
| Milwaukee 2457-21 M12 Ratchet Kit | Cordless ratchet | 3/8-inch drive | Ratchet, battery, 30-minute charger, case |
| Milwaukee 48-22-9482 Metric Set | Manual ratchet and sockets | Metric, 32 pieces | PACKOUT case |
| Milwaukee M12 FUEL High Speed Ratchet Kit | Cordless ratchet | 3/8-inch drive | Ratchet, two batteries, charger, case |
| Milwaukee 56-Piece Mechanics Set | Manual ratchet and sockets | SAE and metric | Removable inner tray |
| Milwaukee 48-22-9481 SAE Set | Manual ratchet and sockets | SAE, 28 pieces | PACKOUT low-profile organizer |
| Milwaukee 43PC SHOCKWAVE Set | Impact-duty deep sockets | SAE and metric | Sockets and accessories |
The Models in Detail
Milwaukee 2457-21 M12 Cordless 3/8-Inch Ratchet Kit Powerful 12-volt motor: Delivers up to 35 ft-lbs of torque
Check price on Amazon 4.4 out of 5 — average from Amazon buyers
The Milwaukee 2457-21 3/8-in Cordless M12 ratchet kit is the classic M12 ratchet. Its 12-volt motor delivers up to 35 ft-lbs of torque and 250 RPM with a variable-speed trigger, and Milwaukee compares it to a pneumatic ratchet without the air hose. It has a reinforced metal housing and trigger, an on-board fuel gauge and a built-in LED, and it weighs 1.9 pounds.
The kit includes one M12 REDLITHIUM battery, a 30-minute charger, an adapter and a carrying case. The description says the battery is sold separately, which conflicts with the feature list and included components; the kit contents list is the more reliable guide. No sockets come in the box.
This ratchet suits home mechanics who spend time spinning long bolts on and off, such as valve covers, splash shields or mower decks. Keep in mind that 35 ft-lbs is for running fasteners, not breaking tight ones loose, so you will still want a manual ratchet for final tightening and stubborn bolts.
Milwaukee 48-22-9482 32-Piece Metric 3/8-Inch Mechanics Set The set features a durable powder coated finish that resists rust and
Check price on Amazon 4.4 out of 5 — average from Amazon buyers
Best for: Metric cars, bikes and flat-pack furniture
Pros
- 32 metric pieces
- PACKOUT case included
- Rust-resistant powder coat
Cons
- Sizes not itemized
- Metric only
The Milwaukee 48-22-9482 32-Piece Metric 3/8 mechanics set pairs a manual ratchet with metric sockets in a PACKOUT case. The listing describes a powder-coated finish that resists rust and corrosion and gives a total weight of 7.49 pounds.
The listing does not itemize which socket sizes are included or how many are deep versus standard, and one specification line calls it a bit set, which does not match the title. Check the product images for the exact contents before buying if you need a specific size.
A metric set is the natural fit for most modern cars, bicycles and flat-pack furniture, which use metric hardware. It gives way to the 56-piece set if you also work on older equipment with SAE fasteners.
Milwaukee M12 FUEL 3/8-Inch High Speed Cordless Ratchet Kit
Check price on Amazon 4.5 out of 5 — average from Amazon buyers
Best for: Heavy cordless ratchet users
Pros
- Two batteries in the kit
- Charger and case included
- 35 ft-lbs listed
Cons
- Very sparse listing
- Speed not stated
The Milwaukee M12 FUEL 3/8″ High Speed ratchet kit has the shortest listing of the group. It states two batteries, a charger and a case, a torque of 35 ft-lbs, a length of 11.1 inches and a weight of 1.7 pounds.
The listing does not give an RPM figure, so the high speed name cannot be compared with the 2457-21’s 250 RPM from the listing alone. It also does not mention an LED, fuel gauge or battery capacity. The second battery is the clear practical difference, since you can keep working while one charges.
Choose this kit if you expect long sessions and want a spare battery on hand. For occasional jobs, the single-battery 2457-21 is the simpler buy, and for the documented details, its listing is far more complete.
Milwaukee 3/8-Inch Drive SAE/Metric 56-Piece Mechanics Tool Set
Check price on Amazon 4.9 out of 5 — average from Amazon buyers
The Milwaukee 3/8 in. Drive SAE and metric 56-piece set is the broadest manual kit here. Its 90-tooth ratchet offers a 4-degree arc swing and a slim profile for tight spaces. The sockets have four parallel flats to stop rolling and to allow a wrench on them, optimized geometry to reduce rounding, and sizes stamped into the flats.
It includes a removable inner tray, weighs 11.2 pounds and is backed by Milwaukee’s Mechanics Hand Tools Lifetime Guarantee. The listing does not list which sizes are included.
This suits a household with a mix of jobs, such as a metric car, an older SAE mower and a bike, where one kit should cover everything. The weight means it lives on a shelf rather than in a backpack.
Milwaukee 48-22-9481 28-Piece 3/8-Inch Drive SAE Set Ratchet has 90 tooth design with 4° arc swing for tight work spaces
Check price on Amazon 4.8 out of 5 — average from Amazon buyers
Best for: SAE-sized mowers and older vehicles
Pros
- Standard and deep SAE sockets
- Slim 90-tooth ratchet
- Compact PACKOUT organizer
Cons
- SAE only
- No metric sizes
The Milwaukee 48-22-9481 28-Piece 3/8 in. SAE set shares the 90-tooth, 4-degree ratchet and four-flat socket design, and adds a flush directional lever. It stores in a PACKOUT low-profile compact organizer.
The listing names standard sockets from 1/4 inch to 1 inch in 13 sizes and deep sockets from 1/4 inch to 3/4 inch in 9 sizes. The remaining pieces are not itemized. The ratchet measures 9.73 inches long.
This set fits someone working mostly on SAE hardware, such as older American vehicles, trailers and many lawn and garden machines. For modern cars and furniture, pair it with the metric set or choose the 56-piece kit.
Milwaukee 43-Piece SHOCKWAVE Impact Duty 3/8-Inch Deep Socket Set
Check price on Amazon 4.2 out of 5 — average from Amazon buyers
The Milwaukee 43PC Shockwave Impact Duty 3/8-inch set is made of deep 6-point impact sockets in SAE and metric sizes. Milwaukee describes forged steel for heavy-duty use, stamped and ink-filled size markings, non-slip hex geometry to prevent rounding and a dual-hole design with a ring groove for easy attachment and removal. It weighs 10.3 pounds.
The listing does not mention a ratchet, so treat this as a socket set to use with a power tool or an existing ratchet. For heavier jobs on larger bolts, see our Milwaukee 1/2 inch impact socket set guide.
Pick this set if you own a 3/8-inch impact wrench or plan to use the M12 ratchets hard. For hand use only, the mechanics sets include a ratchet and are better value in practice.
Matching a Model to Your Setup
- Quick oil changes and splash shields: Milwaukee 2457-21 M12 ratchet plus a socket set.
- A modern metric car and bike repairs: Milwaukee 48-22-9482 metric set.
- Long weekend projects without waiting on a charger: Milwaukee M12 FUEL kit with two batteries.
- A mixed garage of SAE and metric hardware: Milwaukee 56-piece mechanics set.
- An older mower, trailer or SAE vehicle: Milwaukee 48-22-9481 SAE set.
- A 3/8-inch impact wrench that needs deep sockets: Milwaukee 43-piece SHOCKWAVE set.
Before You Buy
The cordless ratchet kits do not include sockets, and the SHOCKWAVE set does not list a ratchet, so most buyers will want one of each type. Several listings are incomplete: the metric set and 56-piece set do not itemize sizes, the 28-piece set names only 22 sockets, and the M12 FUEL listing gives almost no feature detail.
Standard chrome sockets are not designed for impact tools, so use SHOCKWAVE impact sockets with an impact wrench. If you are expanding your cordless tools beyond a ratchet, our Milwaukee drill and impact set guide covers the next step on the M12 and M18 platforms.
FAQ
Which Milwaukee ratchet should I buy for car maintenance?
A cordless M12 ratchet speeds up removing and installing bolts, while a manual mechanics set handles breaking bolts loose and final tightening. Most home mechanics benefit from one of each.
What is the difference between the Milwaukee 48-22-9482 and 48-22-9481?
The 48-22-9482 is a 32-piece metric set in a PACKOUT case. The 48-22-9481 is a 28-piece SAE set in a PACKOUT low-profile organizer.
Does the Milwaukee M12 3/8 ratchet come with a battery?
The 2457-21 kit lists one battery, a charger and a case. The M12 FUEL kit lists two batteries, a charger and a case.
Can I use regular sockets on an M12 ratchet?
Yes. A cordless ratchet is not an impact tool, so standard 3/8-inch sockets work.
Are SHOCKWAVE sockets only for impact tools?
They are rated for impact duty, and they can also be used on a hand ratchet. The listing does not include a ratchet.