9 Best 12-Inch String Trimmers, Compared
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Finding the best 12-Inch string trimmers requires comparing how each tool handles your specific yard needs. We analyzed 9 models based strictly on the specifications published on their listings. The WORX 12-Inch 20V Cordless Trimmer and Blower leads because it combines a 20V power source with a blower function in one compact 10.4-pound kit. This setup lets you trim, edge, and blow debris without switching devices. Use this guide to decide which voltage, weight, and feature set fits your routine.
Quick picks
The best fit for you
- You want to trim, edge, and blow debris with one kit WORX 12-Inch 20V Cordless Trimmer and Blower It combines a 20V trimmer, edger, and Turbine Blower into a single system.
- You need a lightweight tool for precision edging in tight spaces Westinghouse 20V 12-Inch String Trimmer and Edger It weighs only 6 pounds and features automatic line advancement for detailed work.
- You already own DeWALT 20V MAX batteries and want a lightweight option SITEER 12-Inch Cordless Weed Wacker It uses DeWALT 20V MAX batteries and weighs just 4.5 pounds.
- You value extended battery life for small yards with multiple tools BLACK+DECKER 12-Inch 20V Max 3-in-1 Trimmer It includes a 4.0 Ah battery and converts between mower, trimmer, and edger functions.
Our 9 picks
WORX 12-Inch 20V Cordless Trimmer and Blower
Best for: trimming, edging, and light blowing
- Cutting Width
- 12-Inch (what this guide is about)
- Voltage
- 20V
- Cutting Swath
- 12 in
- Power Source
- battery
- Line Feed System
- push-button
- Dimensions
- 37.8 × 10.6 × 8.66 inches
View on Amazon: WORX 12-Inch 20V Cordless Trimmer and Blower
This WORX kit includes a 12-inch cordless string trimmer and a 360 CFM leaf blower. It features a push-button line feed system for easy line extension. The tools weigh 10.4 pounds and use a 20V battery. You get two batteries and a charger. This combo helps you trim grass, edge walkways, and clear debris. It suits users who want multiple tools in one package.
Pros
- Includes a 360 CFM leaf blower
- Push-button line feed system
- Converts to an edger
- Comes with two batteries
Cons
- 20V battery may have less runtime than 40V options
- Heavier than single-tool trimmers due to the blower
- No variable speed control listed for the blower
Good fit if
- You want a trimmer and blower combo
- You prefer push-button line feed
- You need to edge walkways
Skip if
- You need 40V or higher voltage
- You only want a trimmer
- You prefer bump-feed line systems
Verdict: WORX 20V 12-Inch String Trimmer is a practical choice for users who want to trim and blow debris with one kit. It fits those who value the convenience of a push-button feed and an included edger function.
Greenworks 40V 12-Inch Trimmer and Blower Combo
Best for: Clearing edges and blowing debris
- Cutting Width
- 12-Inch (what this guide is about)
- Voltage
- 40V
- Cutting Swath
- 12 in
- Power Source
- battery
- Line Feed System
- auto-feed
- Battery Capacity
- 2.0Ah
View on Amazon: Greenworks 40V 12-Inch Trimmer and Blower Combo
This Greenworks kit pairs a 40V string trimmer with a 390 CFM blower. The 12-inch cutting swath handles thick weeds up to 1 inch. It uses a 2.0 Ah battery that charges in 60 minutes. The trimmer features an auto-feed line system. The blower reaches 110 MPH. This combo suits users who want to clear edges and blow debris in one session. It operates at 67 dB.
Pros
- 40V power system for strong performance
- 390 CFM blower clears wet leaves
- 110 MPH air speed for debris
- 12-inch cutting width for edges
- Auto-feed line system
Cons
- 2.0 Ah battery offers limited runtime
- 16.5 pounds total weight is heavy
- 60-minute charge time is slow
Good fit if
- You need to trim edges and blow debris
- You already own 40V Greenworks tools
- You want a single battery platform
Skip if
- You need longer runtime than 60 minutes
- You prefer lighter equipment under 10 pounds
- You want faster than 60-minute charging
Verdict: Greenworks 40V 12-Inch String Trimmer & Blower Combo fits users who want to trim edges and blow debris with one battery. It works best for clearing driveways and walkways.
BLACK+DECKER 12-Inch 20V Max 3-in-1 Trimmer
Best for: Small yards needing mower, trimmer, and edger
- Cutting Width
- 12-Inch (what this guide is about)
- Voltage
- 20V MAX
- Cutting Swath
- 12 in
- Power Source
- battery
- Battery Capacity
- 4.0 Ah
- Mowing Function
- 3-in-1
This BLACK+DECKER unit combines a mower, string trimmer, and edger in one 12-inch cutting width device. It uses the 20V MAX platform with a high-capacity 4.0 Ah battery, which offers double the runtime of standard 2.0 Ah packs. The package includes two batteries for extended use. You get adjustable deck heights and a pivoting handle for maneuverability. It is a versatile tool for small lawn maintenance tasks.
Pros
- 3-in-1 functionality converts to mower, trimmer, or edger
- Includes two 4.0 Ah batteries for extended runtime
- Adjustable height deck and pivoting handle
- 20V MAX system compatibility
Cons
- 20V MAX voltage is lower than the 40V options on this list
- 12-inch cutting swath is narrower than larger mower options
- Charging time is 2.5 hours at 60 percent capacity
Good fit if
- You want a single tool that mows, trims, and edges
- You need extra runtime for larger jobs with the included 4.0 Ah batteries
- You already own other 20V MAX BLACK+DECKER tools
Skip if
- You prefer higher voltage systems like 40V for more power
- You need a wider cutting deck for faster mowing
- You want a dedicated string trimmer without mower bulk
Verdict: BLACK+DECKER 12-Inch 3-in-1 Mower suits homeowners who value versatility and extended battery life over raw power. It is a practical solution for small yards where converting between tools is more useful than having separate devices.
BLACK+DECKER 20V MAX 12-Inch String Trimmer and Edger
Best for: small lawns with existing 20V tools
- Cutting Width
- 12-Inch (what this guide is about)
- Voltage
- 20V
- Cutting Swath
- 12 in
- Power Source
- battery
- Line Feed System
- push-button
- Included Battery
- Battery and Charger Included
View on Amazon: BLACK+DECKER 20V MAX 12-Inch String Trimmer and Edger
This BLACK+DECKER string trimmer offers a 12-inch cutting width and operates on a 20V MAX battery system. It features a push-button EASYFEED line advance, eliminating the need to bump the head. The PowerDrive Transmission boosts torque for better cutting power. You get two-speed control to switch between runtime and power. It includes a 2.0 Ah battery and charger, weighing 6.3 pounds.
Pros
- Push-button EASYFEED line advance system
- PowerDrive Transmission for increased torque
- Two-speed power and runtime control
- Includes 20V battery and charger
Cons
- 20V system has lower voltage than 24V or 40V competitors
- 2.0 Ah battery offers less runtime than higher capacity options
- No variable speed trigger for precise line control
Good fit if
- You want easy line advancement without bumping
- You already own 20V MAX BLACK+DECKER tools
- You need a lightweight trimmer under 7 pounds
Skip if
- You require 40V power for thick weeds
- You need a high-capacity battery for large yards
- You prefer variable speed control over two settings
Verdict: BLACK+DECKER 20V 12-Inch String Trimmer suits users who prioritize convenience and tool compatibility over raw power. It is ideal for small lawns where the push-button feed saves time.
Greenworks 24V 12" Cordless Trimmer
Best for: users needing a USB power bank and edger function
- Cutting Width
- 12-Inch (what this guide is about)
- Voltage
- 24V
- Cutting Swath
- 12 in
- Power Source
- battery
- Battery Capacity
- 2.0Ah
- Included Battery
- Battery and Charger Included
This Greenworks 24V model features a 12-inch cutting width and weighs 9.46 pounds. It includes a 2.0Ah battery with a built-in 12000 mAh USB power bank. The aluminum telescoping shaft adjusts to your height, and the twist-to-edge technology converts the tool to an edger. It offers variable speed control for on-demand power.
Pros
- 24V Lithium-Ion battery provides fade-free power
- 12000 mAh USB power bank built into the battery
- Twist-to-edge technology converts to edger
- Aluminum telescoping shaft adjusts to user height
- Variable speed trigger delivers on-demand power
Cons
- 2.0Ah battery capacity is smaller than competitors
- 24V voltage is lower than 40V and 20V MAX options
- No remote or app control listed
Good fit if
- You want a built-in USB power bank for charging devices
- You need an edger function with a twist mechanism
- You prefer a lightweight aluminum shaft for height adjustment
Skip if
- You require the highest voltage available for maximum power
- You need a larger battery capacity for extended runtime
- You want a 40V system for compatibility with other tools
Verdict: Greenworks 24V 12-Inch String Trimmer suits users who value the convenience of a built-in USB power bank and the versatility of a twist-to-edge design over raw voltage power.
Westinghouse 20V 12-Inch String Trimmer and Edger
Best for: Precision trimming and edging in tight spaces
- Cutting Width
- 12-Inch (what this guide is about)
- Voltage
- 20V
- Cutting Swath
- 12 in
- Power Source
- battery
- Shaft Type
- adjustable, 8 in adjustment
- Line Feed System
- auto line feed
View on Amazon: Westinghouse 20V 12-Inch String Trimmer and Edger
This Westinghouse tool combines string trimming and edging in one 20V cordless unit. It features a 12-inch cutting swath and auto line feed for continuous operation without bumping. The shaft adjusts 8 inches, and the auxiliary handle positions for comfort. Weighing under 6 pounds, it includes a 2.0Ah battery and charger. This setup suits users needing precision around obstacles and defined edges along hardscapes.
Pros
- 2-in-1 functionality switches between string trimmer and lawn edger
- Auto line feed advances line with the trigger
- Adjustable shaft offers 8 inches of length adjustment
- Weighs under 6 pounds for reduced fatigue
- Foldable wire guide protects nearby plants and fences
Cons
- Includes only a 2.0Ah battery with limited runtime
- 20V platform offers less power than higher voltage competitors
- No variable speed control listed for the motor
Good fit if
- You need to switch between trimming and edging frequently
- You want to avoid bumping the line to advance it
- You need an adjustable shaft for comfortable reach
Skip if
- You require a high-capacity battery for large yards
- You prefer a higher voltage system for heavy weeds
- You need a tool-only purchase without battery included
Verdict: Westinghouse 20V 12-Inch String Trimmer and Edger fits users who value lightweight handling and automatic line advancement for detailed edge work. It is ideal for small to medium yards where precision around obstacles matters more than raw cutting power.
Kobalt 24V Max 12-Inch Straight Shaft Trimmer
Best for: straight-shaft trimming tasks
- Cutting Width
- 12-Inch (what this guide is about)
- Voltage
- 24-Volt Max
- Cutting Swath
- 12 in
- Power Source
- battery
- Shaft Type
- straight
- Included Battery
- Battery and Charger Included
View on Amazon: Kobalt 24V Max 12-Inch Straight Shaft Trimmer
The Kobalt 24-Volt Max 12-inch straight string trimmer offers a focused cutting swath for precise edging and trimming. It includes both a battery and charger, so you can start working immediately. The straight shaft design provides better leverage for users who prefer a rigid handle over a curved one. This tool is ideal for maintaining clean lines along sidewalks and garden beds.
Pros
- Includes battery and charger
- 12-inch cutting swath
- Straight shaft design
- 24-Volt Max power system
Cons
- Lower voltage than many competitors
- Single-function tool only
- Requires assembly
Good fit if
- You want a ready-to-use kit
- You prefer a straight shaft
- You need precise edging
Skip if
- You need a blower attachment
- You want higher voltage power
- You prefer a curved shaft
Verdict: Kobalt 24V 12-Inch Straight String Trimmer fits users who want a dedicated trimming tool with included power. It is a solid choice for those who value the straight shaft for better control and do not need multi-tool versatility.
WORX 20V 12" Cordless Trimmer
Best for: Users wanting a trimmer and mower bundle
- Cutting Width
- 12-Inch (what this guide is about)
- Voltage
- 20V
- Cutting Swath
- 12 in
- Power Source
- battery
- Battery Capacity
- 4.0 Ah
- Mowing Function
- 2-in-1
This WORX kit pairs a 12-inch string trimmer with a 17-inch mower. It includes two 4.0 Ah batteries for extended runtime. The trimmer converts to an edger and features instant line feed. You get six cutting heights on the mower. This bundle suits users who want versatile tools for both trimming and mowing without managing separate battery systems.
Pros
- Includes two 4.0 Ah batteries
- Converts to a wheel edger
- Instant line feed spool system
- Trimmer head tilts 90 degrees
- Mower has six cutting heights
Cons
- Trimmer voltage is 20V, lower than some competitors
- Battery capacity is 4.0 Ah, modest for large lawns
- No remote control or app connectivity listed
Good fit if
- You need a trimmer and mower in one kit
- You want instant line feed for convenience
- You prefer a 12-inch cutting width
Skip if
- You require 40V trimmer power
- You need a larger 16-inch cutting swath
- You want smart app integration
Verdict: WORX 20V 12" Cordless Trimmer is a practical bundle for homeowners who value the convenience of a shared battery system between trimming and mowing tasks.
SITEER 12-Inch Cordless Weed Wacker
Best for: small yards and tight spaces
- Cutting Width
- 12-Inch (what this guide is about)
- Voltage
- 20V MAX
- Cutting Swath
- 12 in
- Power Source
- battery
- Motor Type
- brushless
- Shaft Type
- foldable metal telescopic
This SITEER tool is a 12-inch cordless string trimmer powered by a 20V MAX battery. It uses a brushless motor running at 12,000 RPM for stable torque. The design includes a 3-in-1 function that converts to an edger or small mower. It weighs 4.5 lbs and features automatic line feed. It suits users who own DeWALT 20V MAX batteries and want a lightweight, multi-purpose unit for small yards.
Pros
- Brushless motor delivers 12,000 RPM for consistent power
- 3-in-1 design converts to edger or mower
- Compatible with existing DeWALT 20V MAX batteries
- Automatic line feed reduces manual adjustments
- Rotating cutting head reaches tight angles
Cons
- Battery and charger are not included
- 12-inch cutting swath is narrower than larger trimmers
- Support wheel adds complexity to setup
Good fit if
- You already own DeWALT 20V MAX batteries
- You want one tool for trimming and edging
- You need a lightweight unit under 5 lbs
Skip if
- You prefer a dedicated heavy-duty mower
- You do not own compatible DeWALT batteries
- You need a wider cutting path for large lawns
Verdict: SITEER 12-Inch Cordless Weed Wacker fits users who already have DeWALT 20V MAX batteries and need a lightweight, multi-function tool for small yards and tight spaces.
Specifications side by side
| Spec | WORX 12-Inch 20V Cordless Trimmer and Blower | Greenworks 40V 12-Inch Trimmer and Blower Combo | BLACK+DECKER 12-Inch 20V Max 3-in-1 Trimmer | BLACK+DECKER 20V MAX 12-Inch String Trimmer and Edger | Greenworks 24V 12" Cordless Trimmer | Westinghouse 20V 12-Inch String Trimmer and Edger | Kobalt 24V Max 12-Inch Straight Shaft Trimmer | WORX 20V 12" Cordless Trimmer | SITEER 12-Inch Cordless Weed Wacker |
|---|---|---|---|---|---|---|---|---|---|
| Voltage | 20V | 40V | 20V MAX | 20V | 24V | 20V | 24-Volt Max | 20V | 20V MAX |
| Cutting Swath | 12 in | 12 in | 12 in | 12 in | 12 in | 12 in | 12 in | 12 in | 12 in |
| Power Source | battery | battery | battery | battery | battery | battery | battery | battery | battery |
| Motor Type | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | brushless |
| Shaft Type | not specified | not specified | not specified | not specified | not specified | adjustable, 8 in adjustment | straight | not specified | foldable metal telescopic |
| Line Feed System | push-button | auto-feed | not specified | push-button | not specified | auto line feed | not specified | not specified | automatic |
| Battery Capacity | not specified | 2.0Ah | 4.0 Ah | not specified | 2.0Ah | 2.0Ah | not specified | 4.0 Ah | not specified |
| Cutting Width | 12-Inch | 12-Inch | 12-Inch | 12-Inch | 12-Inch | 12-Inch | 12-Inch | 12-Inch | 12-Inch |
| Mowing Function | not specified | not specified | 3-in-1 | not specified | not specified | 2-in-1 | not specified | 2-in-1 | not specified |
| Application | not specified | not specified | Lawn | not specified | not specified | not specified | not specified | Lawn | not specified |
| Included Battery | not specified | not specified | not specified | Battery and Charger Included | Battery and Charger Included | not specified | Battery and Charger Included | not specified | not specified |
| Dimensions | 37.8 × 10.6 × 8.66 inches | 64.5 × 7.5 × 5 inches | not specified | 41.3 × 9.2 × 5 inches | 39.6 × 4.3 × 9.8 inches | 51.6 × 12.8 × 5 inches | not specified | 56.7 × 17.7 × 41.3 inches | 1 × 1 × 5 inches |
| Weight | 10.4 pounds | 16.5 pounds | not specified | 6.3 pounds | 9.46 pounds | 6 pounds | not specified | 5.3 pounds | 4.5 pounds |
| Size | 20V GT 3.0 Trimmer / Edger + Turbine Blower | 40V 12" + 390CFM (2.0Ah) | 12 inches | One Size | 12" (Battery Included) | not specified | 12 inches | not specified | 12 inches |
| Color | Black and Orange | Green/Black | multi-color | Black | Green | Black | Blue | Black and Orange | Yellow |
| Model | WG928 | STBA40B210 | not specified | LSTE523 | ST24B212 | WST 20V | not specified | WG911 | 1 |
If you need depth specs for bedding, you can compare the best 12 Inch mattresses by layer materials.
Choosing the right 12-inch trimmer
-
Check the drive shaft type
The shaft design affects how you hold and control the tool. The Kobalt 24V model uses a straight shaft, which many users prefer for better balance and control during long trimming sessions. Other models, like the Greenworks 40V, often feature a curved shaft. A curved shaft is generally lighter and easier to store in tight spaces. You should choose the shaft style that matches your comfort preference and storage constraints before making a final decision.
-
Consider included battery capacity
Battery capacity determines how long you can run before recharging. The BLACK+DECKER 12-Inch 20V Max 3-in-1 Trimmer includes a 4.0 Ah battery, which offers extended runtime for larger tasks. In contrast, the Greenworks 40V combo kit comes with a 2.0 Ah battery. Higher amp-hour ratings provide more power over time. If you have a larger yard, look for models with higher capacity batteries to avoid frequent interruptions during your work.
-
Evaluate weight for comfort
Weight impacts how fatigued you feel during use. The SITEER 12-Inch Cordless Weed Wacker weighs only 4.5 pounds, making it one of the lightest options for extended overhead or awkward positioning. The Westinghouse 20V model is also very light at 6 pounds. Heavier tools, like the Greenworks 40V combo at 16.5 pounds, may cause more strain. Choose a lighter model if you plan to trim for long periods or need to maneuver easily around obstacles.
-
Look for multi-function versatility
Some tools combine multiple functions to save space and money. The WORX 12-Inch 20V Cordless Trimmer and Blower includes a blower function, allowing you to clear debris after trimming. The BLACK+DECKER 12-Inch 20V Max 3-in-1 Trimmer also offers versatility. If you want to handle trimming, edging, and blowing with one kit, these multi-function models are practical. You avoid buying separate devices and can switch tasks quickly without changing tools.
-
Verify battery system compatibility
Ensure the trimmer uses a battery you already own to avoid extra costs. The SITEER 12-Inch Cordless Weed Wacker is compatible with DeWALT 20V MAX batteries. This allows you to use existing power sources without purchasing new batteries. Other models require specific brand batteries, such as WORX 20V or Greenworks 40V. Check your current tool ecosystem first. Sharing batteries across devices is a practical way to streamline your maintenance routine and reduce clutter in your garage.
Frequently asked questions
Which 12-inch trimmer is best for edging?
The WORX 12-Inch 20V Cordless Trimmer and Blower is a practical choice for users who want to trim, edge, and blow debris with one kit. It fits those who value the convenience of a push-button feed and an included edger function. This all-in-one design saves space and simplifies your workflow.
Is a 20V or 40V battery better for a 12-inch trimmer?
The best voltage depends on your existing tool ecosystem. If you own BLACK+DECKER or WORX tools, a 20V model like the BLACK+DECKER 20V MAX 12-Inch String Trimmer allows you to share batteries. Greenworks users might prefer the 40V model for higher power output. Match the voltage to your current battery system.
What is the lightest 12-inch string trimmer on the list?
The SITEER 12-Inch Cordless Weed Wacker is the lightest option at 4.5 pounds. It is designed for small yards and tight spaces. The WORX 20V 12" Cordless Trimmer is also very light at 5.3 pounds. These low weights reduce fatigue during extended trimming sessions.
Can I use DeWALT batteries with any of these trimmers?
The SITEER 12-Inch Cordless Weed Wacker fits users who already have DeWALT 20V MAX batteries. It is a lightweight, multi-function tool suitable for small yards. Other models on this list use proprietary battery systems from brands like WORX, Greenworks, or BLACK+DECKER, so check compatibility before buying.
Which trimmer has a straight shaft?
The Kobalt 24V Max 12-Inch Straight Shaft Trimmer features a dedicated straight shaft design. This configuration offers better balance and control for trimming tasks. It is a solid choice for users who value this specific handle type and do not need multi-tool versatility.
Does the Greenworks 24V model include a USB port?
Yes, the Greenworks 24V 12" Cordless Trimmer includes a built-in USB power bank. This feature adds convenience for charging small devices. It also offers a twist-to-edge design for versatility. This model suits users who value these extra features over raw voltage power.
What is the cutting width of these trimmers?
All models on this list have a 12-inch cutting width. This specification ensures a consistent swath of cut regardless of the brand or voltage. The width is a key factor for determining how many passes you need to cover your lawn area.