Best Milwaukee 2825-21ST String Trimmer Kit
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If you are searching for best milwaukee 2825 21st string trimmer kit, you want to know whether the Milwaukee 2825-21ST, a split-boom M18 FUEL trimmer kit with a QUIK-LOK attachment, suits your edging and weed trimming, and what comes in the box. The manufacturer’s page says the kit includes an XC8.0 battery and a rapid charger. The Amazon listing names the kit but does not itemize the battery or charger, and its part number differs from the model number. This review covers only this one kit, using the manufacturer’s page, the listing and five university and government pages.
Quick answer
- Buy it for edging, fence lines and weeds in tight spots if you want an M18 battery trimmer whose power head takes other split-shaft attachments. The manufacturer says the power head is compatible with an edger, an articulating hedge trimmer and a pole saw attachment.
- The manufacturer says the kit includes one M18 REDLITHIUM HIGH OUTPUT XC8.0 battery and one M18/M12 rapid charger. The Amazon listing does not itemize either, so confirm the contents before you order.
- Skip it if you need a confirmed weight or dimensions. The listing gives a weight of 1 kg and a 74-inch length figure, and the manufacturer page we opened gives neither.
- Check the model number, 2825-21ST, against the part number, 2825-21PS, on the listing before you buy. They do not match.
The product at a glance
The first table uses only what the Amazon listing states, as read on 2026-10-23. Where the listing is silent, the cell says “not stated”.
| Item | What the listing states |
|---|---|
| Brand | Milwaukee |
| Model number | 2825-21ST |
| Manufacturer part number | 2825-21PS |
| Product type | String trimmer kit, battery powered |
| Cutting width | 16 inches |
| Speed | 6200 rpm |
| Item weight | 1 kg |
| Item dimensions | A figure starting with 74 inches in length; the width figure is 13 inches |
| Batteries | One lithium-ion battery required (specification field); whether it is included is not stated |
| Charger | not stated |
| Included components | Milwaukee STRING TRIMMER KIT 2825-21ST |
| Bullet text | one bullet, which repeats the kit name |
| Runtime | not stated |
| Warranty | not stated |
Listing and manufacturer side by side
The manufacturer’s product page for the same model number gives the details the listing leaves out. The table below sets the two sources next to each other, and marks the figures that do not agree.
| Item | Amazon listing | Manufacturer product page |
|---|---|---|
| Model | 2825-21ST | 2825-21ST, M18 FUEL String Trimmer w/ QUIK-LOK |
| Part number | 2825-21PS (does not match the model number) | not stated on the page we opened |
| Cutting width | 16 inches | 14 to 16 inches (cutting swath in the specification block) |
| Speed | 6200 rpm | 0 to 4900 and 0 to 6200 rpm, two settings |
| Battery | one lithium-ion battery required; not itemized | one M18 REDLITHIUM HIGH OUTPUT XC8.0 battery included |
| Charger | not stated | one M18/M12 rapid charger included |
| Weight | 1 kg | not stated on the page we opened |
| Dimensions | a figure starting with 74 inches in length | not stated on the page we opened |
| Warranty | not stated | a warranty link, with no term in the text we opened |
| Trimmer line | not stated | Easy Load head, up to 25 feet of line in under 30 seconds |
The two sources agree on the model number, the 6200 rpm top speed and the 16-inch top width. They disagree on the battery and charger, which the listing does not itemize, and on the part number, which the listing gives as 2825-21PS. The listing’s dimension figure is also one the manufacturer page does not confirm, so treat it as unverified until the seller answers.
Who it suits
This kit fits a homeowner who wants a battery string trimmer on the M18 platform and who may later add attachments. The manufacturer calls the power head part of the M18 FUEL QUIK-LOK Attachment System, and says it “is compatible with multiple split shaft attachments such as our Edger, Articulating Hedge Trimmer, and Pole Saw attachment.”
Edges, fence lines and weeds in tight spots
Cornell describes string trimmers as tools that are “typically used to trim grass and cut back weeds.” It adds that a string trimmer “is good for cutting weeds in tight spaces or those not easily reached by a mower.” Illinois Extension says that “String trimmers can reach areas that regular mowers cannot.” Those are the jobs a string trimmer is used for: the edge a mower leaves behind.
Utah State University Extension explains why the edge matters to the whole yard: “Lawn areas may look green and lush, but if the edges are uneven or untrimmed, the whole yard can seem unkempt.” Oklahoma State University Extension agrees that “String trimmers and edgers can separate a good lawn care job from an excellent one.”
Owners who already have an M18 battery
The manufacturer says the M18 system “is fully compatible with over 200 tools.” That statement covers the M18 system in general, not a specific battery you own. Check the battery and charger you already have against the kit’s contents before you assume a fit, and ask the seller to confirm what the listing’s battery field means for your order.
Owners who want the attachment system
The power head is built to take other split-shaft attachments, according to the manufacturer. The listing does not name which attachments ship with this kit. If the attachment system is your reason to buy, check the attachment list before you order.
Skip it if
Several buyers should choose a different trimmer. Each reason below ties to a fact from the listing or a source.
- You need the weight and dimensions confirmed. The listing gives 1 kg and a 74-inch length figure, but the manufacturer page we opened gives neither, so you cannot check them against a second source.
- You need the battery and charger listed as included. The manufacturer says they are included, but the listing does not itemize them and its battery field reads “required.”
- You need a warranty term before you buy. The manufacturer page has a warranty link, but the text we opened gives no term.
- You need one model number to match your paperwork. The listing gives 2825-21ST and 2825-21PS, and the two do not match.
- You need a swath wider than 16 inches. The manufacturer gives a 14 to 16 inch cutting swath, so the top figure is 16 inches.
If you are new to the M18 battery platform or to battery naming, our guide to battery voltage and amps is a starting point for comparing battery platforms. For a different 60-volt trimmer, see our DEWALT FLEXVOLT 60V MAX string trimmer guide.
How to use a split-shaft trimmer safely
None of the university pages we opened covers this kit, so this section explains string trimmer use in general. Start with safety. Cornell says that “String trimmers are one of the most dangerous lawn and landscaping tools.” Before you start, check the area, because Cornell advises checking the ground for “loose debris such as glass, metal, small stones, etc.” before trimming.
Protective gear comes next. Illinois Extension recommends face shields “Especially for string trimmers and when mowing where ricocheting objects are possible.” Oklahoma State University Extension says to “Wear protective clothing when operating a weeder, edger or trimmer.”
Direction matters as well. Cornell says to “Pay attention to spin direction.” It explains that the spin direction decides which way you work along an edge, so you move the clippings away from the area you have already cleaned. Check the head’s rotation before you start a pass along a bed or a fence.
When you swap an attachment, the OSHA power-tools page applies. It says to “Disconnect tools when not in use, before servicing, and when changing accessories such as blades, bits, etc.” OSHA also advises “gloves and appropriate safety footwear when using electric tools.” Apply both to the QUIK-LOK attachment swap, not only to the line head.
Illinois Extension adds a caution about trees: “Trimmers are often used around trees and are known to damage trunks that, if severe enough, can girdle and kill a tree.” Keep the head away from trunks and the base of young trees.
Mistakes to avoid
- Assuming the battery and charger are in the box because the manufacturer says so. The listing does not itemize them.
- Swapping an attachment without disconnecting the tool first. OSHA says to disconnect before changing accessories.
- Skipping the face shield. Illinois Extension recommends one for string trimmers.
- Trimming with the spin direction ignored. Cornell says to pay attention to spin direction.
- Working into bark. Illinois Extension warns that trimmers around trees can damage the trunk.
What the listing does not say
The listing is short. Its one bullet repeats the kit name, and its specification table gives the model number, the part number, the cutting width, the speed, the weight and a dimension figure. Four gaps matter most for this kit.
Battery and charger
The listing’s battery field reads “1 Lithium Ion batteries required,” and it does not say whether that battery is in the box. The manufacturer’s page says the kit includes one XC8.0 battery and one M18/M12 rapid charger. Until the seller confirms the contents, the battery and charger remain the main open question on this listing.
Part number and model number
The listing gives the model number 2825-21ST and the part number 2825-21PS. The two do not match, and the listing does not explain the difference. The manufacturer page we opened uses 2825-21ST as its model, and it does not show the part number 2825-21PS in the text we opened.
Weight and dimensions
The listing gives an item weight of 1 kg and a dimension figure that starts with a 74-inch length. The manufacturer page we opened gives no weight and no dimensions. The manufacturer page does not confirm that figure, so confirm the dimension with the seller before you plan storage.
Warranty and runtime
The listing states no warranty term, and the manufacturer page’s warranty link gives none in the text we opened. Neither source gives a runtime, because runtime depends on the battery and the work. Ask for both in writing.
Before you order
Four checks cover most of the open questions above. Each one starts from a fact the listing or the manufacturer page gives.
- Confirm that the battery and the charger are in the box. The manufacturer says they are; the listing does not itemize them.
- Ask which part number ships, 2825-21ST or 2825-21PS, and check it against the label on the box.
- Ask for the weight, the overall dimensions and the warranty terms, since the listing and the manufacturer page we opened do not give them.
- Check which QUIK-LOK attachments you want, and confirm they are sold for this power head before you order them.
How we chose
This post covers one product: the Milwaukee 2825-21ST string trimmer kit, ASIN B07PFRRGM4. The keyword names this kit directly, so the post does not compare it with other trimmers and does not rank it. The listing was read on 2026-10-23, and its title, bullet and specification table were saved in the research file for this post. That read is the data date for everything the listing states.
The manufacturer’s product page for the same model number was found by search and opened on 2026-10-23. It is the source for the kit contents, the motor and speed figures, the line-loading claim and the attachment compatibility. The safety and technique facts come from five university and government pages opened on 2026-10-22. Those pages cover string trimmers and power tools in general, not this kit.
What we could not verify
The listing, the manufacturer page and the sources we opened do not answer every question a buyer will ask about this kit. The points below are not confirmed.
- Whether the battery and charger ship with the Amazon listing, because the listing does not itemize them.
- Which part number ships, because the listing gives 2825-21ST and 2825-21PS.
- The weight and the overall dimensions, because the manufacturer page we opened gives neither and the listing’s dimension figure is unconfirmed.
- The warranty term, because neither page we opened states it in text.
- Runtime on any job, since the manufacturer’s runtime claim is not given in the text we opened.
- Cut quality on thick or wet growth. The sources we opened do not cover this model’s performance.
FAQ
Does the Milwaukee 2825-21ST come with a battery and charger?
The manufacturer’s page says the kit includes one M18 REDLITHIUM HIGH OUTPUT XC8.0 battery and one M18/M12 rapid charger. The Amazon listing does not itemize either, so confirm the contents with the seller before you order.
What cutting width does the trimmer have?
The listing gives a cutting width of 16 inches. The manufacturer’s specification block gives a cutting swath of 14 to 16 inches, and its motor description says up to a 16-inch swath.
How fast does the head spin?
The listing gives a speed of 6200 rpm. The manufacturer gives two settings, 0 to 4900 rpm and 0 to 6200 rpm, and a variable speed trigger.
How long does it take to reload the line?
The manufacturer says the Easy Load head lets you load up to 25 feet of trimmer line in under 30 seconds. The listing does not state a reload time.
Can I use other attachments with the power head?
The manufacturer says the M18 FUEL power head is compatible with multiple split-shaft attachments, including an edger, an articulating hedge trimmer and a pole saw attachment. The listing does not name the attachments that ship with this kit.
What safety steps should I follow?
OSHA says to disconnect tools before servicing and when changing accessories such as blades. It also advises gloves and appropriate safety footwear when using electric tools. Cornell says string trimmers are among the most dangerous lawn tools, so check the ground and wear a face shield before you start.
Bottom line
Buy this kit only if the seller confirms the battery and charger are in the box and the part number that ships matches the label you expect; if you need a confirmed weight, dimensions or warranty before you buy, choose a listing that states them.
Sources
- Milwaukee String Trimmer KIT 2825-21ST, Amazon listing (opened 2026-10-23) https://www.amazon.com/dp/B07PFRRGM4
- M18 FUEL String Trimmer Kit w/ QUIK-LOK, Milwaukee Tool product page (opened 2026-10-23) https://www.milwaukeetool.com/products/2825-21ST
- Maintaining Lawn Equipment, Illinois Extension (opened 2026-10-22) https://extension.illinois.edu/lawns/maintaining-lawn-equipment
- Beyond The Mower: Safe Use Of Trimmers, Edgers And Blowers, Oklahoma State University Extension (opened 2026-10-22) https://extension.okstate.edu/announcements/grow-gardening-columns/2025/august-24-2025.html
- Tips for Edging Your Lawn, Utah State University Extension (opened 2026-10-22) https://extension.usu.edu/archive/tips-for-edging-your-lawn
- Mechanical Control, Turfgrass and Landscape Weed ID, Cornell University (opened 2026-10-22) https://turfweeds.cals.cornell.edu/pfm/mechanical-control
- Electrical Incidents: Power Tools, Occupational Safety and Health Administration eTool (opened 2026-10-22) https://www.osha.gov/etools/construction/electrical-incidents/power-tools
