7 Best String Trimmer Head Replacement (November 2026)
The best string trimmer head replacements include the Husqvarna 537388101 T35 String Trimmer Head Replacement for easy straight-shaft replacement, the Weed Warrior PivoTrim Universal Fixed Line Trimmer for pivoting fixed lines, and the Weed Warrior EZ Lock Universal Fit String for aggressive 4-line cutting.
On this page (6 sections)
- Which replacement weed eater head is best for each job?
- How should you compare weed eater heads?
- Is a replacement head better than a replacement spool?
- How do you replace and reload a trimmer head?
- What is the best string trimmer head replacement for tall weeds?
- Final choice: which weed eater head replacement should you buy?
The best string trimmer head replacement is the Husqvarna T35 for most compatible straight-shaft trimmers. It comes pre-wound with .095-inch line, holds 28 ft, and uses a split spool designed to reduce tangling.
The right weed eater head replacement depends on how you reload line and how closely the new head must match your trimmer. A model-specific head is easier to match, while a universal head gives you more flexibility but requires careful checks of the shaft, thread and rotation direction.
If you need more than the head itself, compare these best string trimmer replacement parts. For basic terminology and shaft differences, our guide to string trimmers and edgers is a useful starting point.
Our picks at a glance
-
1
Best for easy straight-shaft replacementHusqvarna 537388101 T35 String Trimmer Head Replacement
9.7/10 our score
See it on Amazon -
2
Best for pivoting fixed linesWeed Warrior PivoTrim Universal Fixed Line Trimmer
9.6/10 our score
See it on Amazon -
3
Best for aggressive 4-line cuttingWeed Warrior EZ Lock Universal Fit String
9.5/10 our score
See it on Amazon
- 4
Check itSKIL 14-Inch Replacement Rapid Reload String Trimmer
Best for compatible SKIL trimmers - 5
Check itSIMUSI Universal Weed Eater Head
Best for broad adapter coverage - 6
Check itVIABRICO Trimmer Head Compatible for Echo Speed
Best for Echo straight-shaft replacements - 7
Check itQuintillus H02 Weed Eater Head Universal Trimmer
Best for counterclockwise universal fit
Which replacement weed eater head is best for each job?
The Husqvarna T35 is the strongest overall pick, while PivoTrim and EZ Lock suit fixed-line users who want fast reloads. The SKIL head is the safest choice for the listed SKIL machines because it is tied to specific trimmer models.
Our score weighs specs, features and buyer feedback against what you're shopping for. We compared loading method, line capacity, durability materials, shaft compatibility and the amount of fit checking each head requires.
Husqvarna 537388101 T35 String Trimmer Head Replacement: Best for easy straight-shaft replacement
- Pre-wound with .095-inch line
- Holds 28 ft of .095-inch line
- Split spool helps reduce tangling
- Compatible with Husqvarna straight-shaft trimmers
The T35 combines a pre-wound spool, easy reload design and broad straight-shaft compatibility. It suits homeowners who want a familiar spool system instead of pre-cut fixed-line strips.
Pros
- Pre-wound for quick setup
- 28-ft line capacity
- Split spool helps reduce tangling
Cons
- Straight-shaft fit must be confirmed
- Manual power source
The Husqvarna T35 is the best weed eater head replacement for a compatible straight-shaft trimmer. Its pre-wound .095-inch line lets you start with less setup, and the spool holds 28 ft for longer trimming runs between reloads.
The spool comes off with the cap, so you can reload it without turning the trimmer upside down. That cap off design also makes it easier to clean grass buildup and check the line for tight spots.
Arrows show the winding direction, while the split-spool design is intended to reduce tangling and line welding. Following those arrows matters in daily use because a crossed spool can feed unevenly and waste line.
The T35 is compatible with Husqvarna straight-shaft trimmers in the 100–500 series and most Echo, STIHL and RedMax straight-shaft trimmers. It accepts line from .065 to .105 inches, so match the diameter to your trimmer and the work you do.
Choose it when you want a conventional spool with broad straight-shaft coverage. Confirm your shaft and model before ordering, especially if your trimmer has a curved shaft.
Weed Warrior PivoTrim Universal Fixed Line Trimmer: Best for pivoting fixed lines
- 6 pivoting lines
- Accepts .080- and .095-inch line
- Pre-cut line included
- Metal material
PivoTrim replaces spool winding with pre-cut strips and 6 pivoting lines. It suits trimming, edging and brush cutting where a fixed-line head makes reloads simple.
Pros
- Pre-cut line included
- Quick strip loading
- Pivoting line design
Cons
- Uses fixed strips instead of a spool
- Fit still needs model confirmation
PivoTrim is the best replacement head for buyers who prefer pre-cut line over spool winding. Its 6 pivoting lines accept .080- or .095-inch line, and premium pre-cut line is included.
The pivoting design gives each line room to move when it meets an obstacle. That makes this head suited to edging, brush cutting and trimming around hard surfaces, although the exact fit still needs to be checked against your trimmer.
For a complete edging setup, compare trimmer and edger combos.
The head uses a 3-line design and is described for most trimmer models. Its metal material and pivoting line layout make it a different choice from the spool-based Husqvarna.
Choose PivoTrim if your priority is fast strip replacement and a fixed-line setup. It may be less suitable if you prefer buying line in a long roll and winding your own spool.
Weed Warrior EZ Lock Universal Fit String: Best for aggressive 4-line cutting
- 4-line fixed head
- Accepts .080-.095-inch line
- Universal fit hardware kit
- Pre-cut strips load without opening the head
EZ Lock uses 4 fixed lines for trimming, edging and weed eating. Its hardware kit and pre-cut strips make it a practical choice when you want aggressive cutting without opening a spool.
Pros
- 4-line design
- Hardware kit included
- Works with select cordless models
Cons
- Cordless compatibility is model-specific
- Gasoline-powered head
EZ Lock is the best weed eater head replacement for aggressive 4-line trimming and edging. It accepts .080- to .095-inch line and uses pre-cut strips, so you can reload without opening the head.
The package includes the trimmer head and a universal fit hardware kit. That kit is useful because it lets you match the head to more than one spindle type, but you still need to identify the right adapter first.
The head is designed for trimming, edging and weed eating tasks, with a 6.44-inch cutting width listed in its specifications. In daily use, that width suits paths, beds and fence lines where you want a clear edge in a few passes.
Cordless compatibility is model-specific. The listed examples include Craftsman 20V, Hart 20V and 40V, Kobalt 40V and 80V, Makita 18V, Ryobi 18V, plus other named platforms.
Choose EZ Lock when four fixed lines fit your cutting style. Check the exact cordless model and the included adapter before installation, and keep spare strips on hand so a worn line does not end the job early.
SKIL 14-Inch Replacement Rapid Reload String Trimmer: Best for compatible SKIL trimmers
- Rapid Reload head
- Bump-feed design
- 14-inch size
- 10,000 rpm
This SKIL head is the clearest choice for the listed SKIL brushless PWR CORE 40 and PWR CORE 20 trimmers. It keeps the original style of bump-feed operation while replacing the worn head.
Pros
- Rapid Reload design
- Bump-feed operation
- Specific SKIL model fit
Cons
- Limited to listed SKIL trimmers
- Not a general universal head
The SKIL Rapid Reload head is the best replacement for the listed SKIL brushless trimmers. It fits the SKIL LT4818-10 and LT1400C-11-STH4818, including the PWR CORE 40 14-inch and PWR CORE 20 13-inch trimmer groups.
Its bump-feed design keeps the operating method familiar for those machines. You tap the head to extend line in the same way you would with the original head, so there is little relearning involved.
The head is sized for a 14-inch trimmer and has a listed speed of 10,000 rpm. That size helps you cover a wider strip when trimming open lawn edges, while a steadier pace helps you keep the cut even near beds.
This is not a general universal weed eater head. Its strength is the direct match to the named SKIL models, so buyers with another brand should choose one of the broader-fit heads instead.
Choose it when your SKIL head is worn and you want the rapid reload format. Match the model number before ordering, and check that the brushless trimmer group lines up with your machine.
SIMUSI Universal Weed Eater Head: Best for broad adapter coverage
- 13-piece hardware adapter kit
- 12 pre-cut 1-ft triangular lines
- Accepts 2.0-3.0 mm line
- Reinforced nylon and fiberglass
SIMUSI is aimed at buyers who need several adapter choices and quick line insertion. Its hardware kit covers multiple thread sizes, but the spindle direction and thread must be checked before ordering.
Pros
- Many adapter choices
- 12 pre-cut line pieces included
- Fits gas and cordless trimmers
Cons
- Thread match is the buyer's responsibility
- Adapter setup takes more checking
SIMUSI is the best universal weed eater head for buyers who need several adapter options. Its 13-piece hardware adapter kit includes 5 nuts, 6 bolts, a spacer and a washer for different thread sizes.
The head accepts 2.0–3.0 mm line and includes 12 pre-cut 1-ft triangular pieces of .095-inch line. Those short pieces mean you insert line instead of winding a spool, which can save time when you only need a quick touch up.
Reinforced nylon and fiberglass construction is intended for low-height trimming around driveway cracks, mulch and fence edges. That material choice suits close work where the head brushes hard surfaces more often than a spool head might.
SIMUSI covers clockwise and counterclockwise brush trimmers, gas trimmers, brush cutters and cordless trimmers from brands such as Echo, EGO, DeWalt, STIHL, Husqvarna, Ryobi, RedMax and Craftsman. The thread direction and size still need to match your spindle.
Choose it when flexibility matters more than a simple model-specific fit. Compare the existing bolt or nut with the adapter kit before installing, and set the head aside if no piece matches cleanly.
VIABRICO Trimmer Head Compatible for Echo Speed: Best for Echo straight-shaft replacements
- 5-pack
- M10 x 1.25 mm bolt size
- 10,000 rpm maximum rotation speed
- Fits listed Echo and Shindaiwa straight-shaft models
VIABRICO makes sense when you need several replacement heads for compatible Echo or Shindaiwa straight-shaft trimmers. Its broad line-size range is useful, but it does not include adapters.
Pros
- 5 heads in the package
- Broad line-size range
- Bump loading without disassembly
Cons
- No adapters included
- Does not fit curved shafts
VIABRICO is the best replacement head for compatible Echo Speed Feed and PAS straight-shaft trimmers. The package contains 5 heads, each designed around an M10 x 1.25 mm bolt size.
It accepts .080-, .095-, .105- and .130-inch line, with 6.56 ft of line included. That range gives you a choice for light grass or heavier weeds, as long as your trimmer allows the diameter you pick.
The bump head reloads without disassembly, and the listed maximum rotation speed is 10,000 rpm. In practice, that means you thread line through the aligned holes and turn the cover to shorten the line, without taking the whole head apart.
Compatibility includes named Echo Speed Feed 400, SRM and PAS models, along with listed Shindaiwa models. The head is for straight shafts only and does not include adapters, so check the female hole and bolt size first.
Choose it when you need multiple heads for the same compatible equipment. It is a poor match for curved-shaft trimmers or a spindle that needs a different adapter.
Quintillus H02 Weed Eater Head Universal Trimmer: Best for counterclockwise universal fit
- 7-piece hardware kit
- 14 ft of .095-inch line
- Glass-filled nylon head
- 304 stainless steel hardware
The H02 combines a bump-feed setup with a hardware kit and a coil of .095-inch line. It suits buyers whose trimmer rotates counterclockwise and whose spindle matches one of the included fasteners.
Pros
- 14 ft of line included
- 7-piece hardware kit
- 304 stainless steel hardware
Cons
- Counterclockwise rotation required
- Fit depends on included hardware
Quintillus H02 is the best universal weed eater head for counterclockwise-rotating trimmers. It comes with 14 ft of .095-inch line, a bump-feed setup and a 7-piece hardware kit.
The head uses glass-filled nylon, while the hardware uses 304 stainless steel. The kit includes M8 x 1.25-LH, M10 x 1.25-LH, M7 x 1.0-LH, M8 x 1.25-LH, M10 x 1.25-LH and M10 x 1.0-LH fasteners in the stated bolt and nut set.
Quintillus lists compatibility with many gas and cordless brands, including EGO, Echo, Husqvarna, STIHL, RedMax, Ryobi, Cub Cadet, Milwaukee, Kobalt, Poulan and MTD. The trimmer must rotate counterclockwise, and the spindle must match the included hardware.
Choose H02 when you want a bump-feed head with line included and your rotation direction is confirmed. Take extra care during installation because a wrong hardware match can prevent a secure fit.
How should you compare weed eater heads?
Compare a weed eater replacement head by loading method first, then check line size, shaft type, thread and rotation direction. The fastest reload system is not useful if the head does not match the spindle.
Spool, bump feed or fixed line?
A spool head stores line inside the head. The Husqvarna T35 uses a spool and holds 28 ft of .095-inch line, while the SKIL head uses a bump-feed format made for specific SKIL trimmers.
Fixed-line heads use short strips that you insert through the head. PivoTrim uses 6 pivoting lines, and EZ Lock uses a 4-line design.
SIMUSI and VIABRICO also use quick-insert approaches, with different line and fit requirements.
Choose a spool when you want a continuous line supply. Choose fixed line when you want to reload without winding or opening the head.
How important is shaft compatibility?
Shaft compatibility is essential because straight and curved shafts do not share the same fit by default. Husqvarna, VIABRICO and the listed model-specific heads require close attention to shaft type and model.
Universal heads offer wider coverage, but universal does not mean every spindle fits. SIMUSI requires a thread and direction check, while Quintillus requires counterclockwise rotation and a match with one of its included fasteners.
For Echo equipment, compare this guide with the best replacement heads for Echo weed eaters. STIHL owners can also review the best weed eater heads for STIHL trimmers before choosing a universal head.
Does line size affect the choice?
Line size affects whether the replacement head can work with your trimmer. The products here accept ranges from .080 to .130 inches, while the Husqvarna T35 accepts .065 to .105 inches.
Do not select a thicker line only because it sounds stronger. Use a diameter supported by both the trimmer and the replacement head, then consider the grass, weeds and edging work you need to do.
What should you check before installation?
Check the shaft type, spindle thread, rotation direction, line diameter and whether an adapter is included. Remove the old head only after you have recorded the existing bolt or nut size and thread direction.
A universal adapter kit can make fitting easier, but it also creates more chances for a mismatch. SIMUSI and Quintillus include several hardware options, while VIABRICO does not include adapters.
Install the head with the trimmer powered off and follow the head's loading directions. Keep the line balanced, use the correct winding or insertion path, and stop if the head does not seat firmly.
Is a replacement head better than a replacement spool?
A replacement head is better when the housing, bump knob or line-loading system is worn. A cracked housing can let line slip, and a worn bump knob can stop feeding line at the moment you need it most.
A replacement spool is better when the head is still sound and only the wound line has run out. In that case, the outer parts still seat firmly and a new spool restores the supply without changing the fit.
If your current head works but reloads are messy, compare these best string trimmer replacement spools. A spool swap keeps the same thread and rotation direction, so you avoid adapter checks.
If the head itself is cracked, loose or difficult to load, replacing the full head is usually the more direct repair. A full head also resets the line path, which helps when tangled line has damaged the internal guides.
Choose based on which part is failing rather than on habit. Save money with a spool when the mechanism is fine, and replace the head when wear affects safety, balance or feeding.
How do you replace and reload a trimmer head?
Turn off the trimmer, disconnect the power source, and confirm that the cutting head cannot spin. That pause matters because a head that still turns can catch a glove or a loose sleeve during removal.
Remove the old head according to the trimmer's instructions, then match the new head's adapter, thread and rotation direction. Keep the old bolt or nut beside the new hardware so you can spot a size mismatch before you tighten anything.
Load the line according to the head design. Spool heads need correct winding, while fixed-line heads need strips inserted through the correct openings.
The guide to restringing a string trimmer head covers the spool-style process in more detail. Read that section first if your new head uses a spool rather than pre-cut strips.
Keep the line balanced on both sides or the head may vibrate in use. Even lengths feed more smoothly and reduce the urge to tap the head harder than needed.
After installation, pull on the head and line to check that everything is secure. Test the trimmer at low speed in a clear area, then stop and recheck the head if it vibrates, slips or fails to feed line.
Store the trimmer with the line retracted when you can. That habit protects the line from heat and keeps the next start easier.
What is the best string trimmer head replacement for tall weeds?
The best string trimmer head replacement for tall weeds is the one that matches your trimmer while accepting a suitable line size and loading method. The PivoTrim, EZ Lock and universal heads here focus on fixed or quick-loaded lines, while the Husqvarna T35 gives you a larger .095-inch spool capacity.
Tall weeds punish a head that feeds unevenly or breaks line too often. A spool head with enough capacity lets you work through a taller patch without stopping to insert new strips every few minutes.
Fixed-line heads can still help when you need fast reloads near fences and posts. Their trade off is shorter line pieces, so you should plan for more frequent changes in dense growth.
A head cannot make an underpowered or poorly matched trimmer suitable for every weed. If the machine itself is the limitation, compare our guide to the best string trimmer for tall weeds.
Match line diameter to the trimmer first and to the head second. A thicker line only helps when both parts are built for it, and forcing it can strain the cutting system.
For tall weeds, choose capacity and a secure fit over extra features. A head that mounts well and feeds reliably will do more work than a flexible head that never seats properly.
Final choice: which weed eater head replacement should you buy?
Choose the Husqvarna T35 for the best balance of pre-wound setup, 28-ft capacity and straight-shaft compatibility. It suits most compatible straight-shaft trimmers when you want a familiar spool system.
Choose PivoTrim for pivoting fixed lines, EZ Lock for 4-line cutting, or SKIL when you own one of the named SKIL trimmers. Those picks match the way you want to reload line each time you trim.
Pick SIMUSI or Quintillus when adapter flexibility matters and you are willing to confirm the spindle carefully. Both reward a close check of thread size and rotation direction before you start.
Pick VIABRICO when you need a 5-pack for compatible Echo or Shindaiwa straight-shaft equipment. It makes the most sense when the models and bolt size already match your trimmer.
If you are unsure, start with fit rather than features. The right head is the one that mounts securely, feeds line well and matches the work you do most often.
Our top 3 picks at a glance
-
1
Best for easy straight-shaft replacement
Husqvarna 537388101 T35 String Trimmer Head Replacement
9.7/10 our score
See it on Amazon -
2
Best for pivoting fixed lines
Weed Warrior PivoTrim Universal Fixed Line Trimmer
9.6/10 our score
See it on Amazon -
3
Best for aggressive 4-line cutting
Weed Warrior EZ Lock Universal Fit String
9.5/10 our score
See it on Amazon
Frequently asked questions
What is the best string trimmer head replacement?
The Husqvarna T35 is the best string trimmer head replacement for most compatible straight-shaft trimmers because it comes pre-wound, holds 28 ft of .095-inch line and uses a split spool. Choose a model-specific SKIL head or Echo replacement when your trimmer requires a narrower fit.
How do I choose a weed eater replacement head?
Match the replacement head to your shaft type, spindle thread, rotation direction and line size. Straight and curved shafts are not interchangeable by default.
Check whether your trimmer uses a spool, bump feed or fixed pre-cut strips, then confirm the exact model or adapter before ordering.
Are universal weed eater heads really universal?
Universal weed eater heads cover many models, but they still depend on thread size, thread direction and shaft design. SIMUSI and Quintillus include several hardware choices, while VIABRICO is limited to listed straight-shaft models and does not include adapters.
Is a fixed-line head better than a spool head?
A fixed-line head can reload quickly because you insert pre-cut strips instead of winding a spool. A spool head gives you a continuous line supply and may suit routine lawn trimming better.
Choose fixed line for simple reloads, or a spool when line capacity matters more.
What line size should a replacement trimmer head use?
Use the line diameter approved for your trimmer and replacement head. The products here range from .080 to .130 inches, while the Husqvarna T35 accepts .065 to .105 inches.
Thicker line is not automatically better if the head or trimmer is not designed for it.
