Top 10 Best kobalt trimmer head in 2026

Last Updated - 6/12/2026

🏆Best Choice

WEED WARRIOR

Weed Warrior Autowinder II Universal Fit String Trimmer Replacement Bump Head

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Autowinder II Bump Head: Replace the bump head of your gas-powered or cordless weed trimmer; This replacement part lets you easily load string trimmer line without opening the head by inserting the line and cranking the bump knob
•Universal Fit: Bump head replacement part is equipped for both gas and cordless trimmers; Accommodates up to 16 feet of and fits 80/1000-inch to 105/1000-inch diameter line
•Universal Fit: Compatible with nearly all brands of gas and cordless string trimmers including Echo, Stihl, Husqvarna, Redmax, Ryobi, Cub Cadet, Weed Eater, Poulan, MTD and more
•Professional Grade: Find the right replacement parts for your trimmer or weed whacker; Our brand-compatible trimmer line, fixed line, bump feed, hybrid and bladed heads are built to the high standards and demanding needs of professional landscapers
•Weed Warrior: We manufacture high quality universal fit weed wacker trimmer line, heads, and accessories built for extreme toughness through years of detailed research and development both in the lab in in the field

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$30.00

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WEED WARRIOR

Weed Warrior EZ Lock Universal Fit String Trimmer Replacement Head, black

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•EZ Lock Replacement Head: For highly durable, trimming, edging and weed eating tasks, the easy-to-install EZ Lock fixed line trimmer head replacement gets the job done; Ruggedly built from high-quality materials; Fits a variety of line sizes
•Easy To Install: Remove the old head and thread on the EZ Lock with included hardware and adapter if needed; Uses pre-cut line strips to save you the time and hassle of spooling line, without the need to open the head
•Universal Fit: Fits 80/1000-inch to 105/1000-inch diameter line and is compatible with nearly all brands of gas and cordless string trimmers including Echo, Stihl, Husqvarna, Redmax, Ryobi, Cub Cadet, Weed Eater, Poulan, MTD and more
•Professional Grade: Find the right replacement parts for your trimmer or weed whacker; Our brand-compatible trimmer line, fixed line, bump feed, hybrid and bladed heads are built to the high standards and demanding needs of professional landscapers
•Weed Warrior: We manufacture high quality universal fit weed wacker trimmer line, heads, and accessories built for extreme toughness through years of detailed research and development both in the lab in in the field

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$23.25

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Kaberalty

Kaberalty KST140XB Replacement Trimmer Bump Knob Compatible with Kobalt 80V KST 140XB(Item #820915) 623439 670250 2908003 and 808958 String Trimmer (3 Pack)

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•KST140XB Replacement Trimmer Bump Knob Compatible with Kobalt 80V KST 140XB(Item #820915) 623439 670250 2908003 and 808958 String Trimmer
•2908003 Replacement Trimmer Bump Knob is made of impact-resistant plastic and has a durable construction that promises great durability while reducing the risk of breaks or cracks
•KST140XB Trimmer Knob can be installed on kobalt 80v trimmer without any tools
•KST140XB Bump Knob will keep your trimmer head feeding like new, ensuring very smooth running and the best performance for your trimmer
•3 Pack KST140XB Bump Knob included,if you have any quality problems, please feel free to contact us,we will provide appropriate solutions within 24 hours

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$18.69

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THTEN

Thten KST 2224B-03 KLS124-03 Trimmer Spring Cover Knob Compatible with Kobalt 24 Volt KST 1124B-03, KST 2024A-03,KST 4024A-03,KST 4024AB-03 12 inch Straight Shaft String Trimmer

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•Compatible with Kobalt 24-volt 12-in KLS124-03,KST 1124B-03, KST 2024A-03, KST 2224B-03, KST 4024A-03.KST 4024AB-03 Straight Shaft Battery String Trimmer
•Kobalt Item number:856456,1157557,1137837,3488480
•Maintains Proper Tension: Helps to maintain the proper tension and operation of your trimmer head for smooth, consistent line feed.
•Easy Installation: Simple to install with minimal effort—restores your trimmer’s functionality quickly and efficiently.
•Durable Construction: Made from high-quality, corrosion-resistant steel, providing long-lasting durability and strength to handle the demands of regular trimming.

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$17.99

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Kaberalty

Kaberalty KLS124-03 Replacement Trimmer Head Compatible with Kobalt 24V KST 2224B-03 KST1124B-03 KST 2024A-03 KST 4024A-03 KST 4024AB-03 (Item#1504979 1137837 3488480) String Trimmer

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•KLS124-03 Trimmer Head Replacement Compatible with Kobalt 24V KST 1124B-03,KST 2024A-03,KST 2224B-03 and KST 4024A-03 KST 4024AB-03 (Item# 1504979 1137837 3488480)
•KLS124-03 1157560 Trimmer Head Replacement with pre-wound 0.080"16ft line
•KST2224B-03 Trimmer Head is designed for easy and quick installation and replacement,users do not need special tools or specialized knowledge to complete the operation,which greatly saves the time cost of maintenance and replacement of consumables
•KST2024A-03 Replacement trimmer head shell is made of ABS material and line is made of high quality nylon material to maximize cutting efficiency and durability,providing long-lasting service for all your trimming needs
•You will get 1* KST2224B Replacement Trimmer Head. If you have any quality problems, please feel free to contact us,we will provide appropriate solutions within 24 hours

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$25.69

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Kaberalty

Kaberalty KST2580-06 KTHA1040-03 4665020 Replacement Trimmer Knob Compatible with Kobalt 24V KST224A-03 KST224B-03,40V KST1040A-03 KST1040B-03 KST2540-06 String Trimmer (3 Pack)

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•Attention: The Trimmer Knob does not fit for Kobalt 2908003 Trimmer Head which is not compatible with KST 2580-06 String Trimmer
•KST2580-06 KTHA1040-03 4665020 Replacement Trimmer Knob Compatible with Kobalt 24V KST224A-03 KST224B-03,40V KST1040A-03 KST1040B-03 KST2540-06 String Trimmer
•KST2580-06 Bump Knob is made of impact-resistant plastic and has a sturdy construction that promises great durability while reducing the risk of breaks or cracks
•KST224B-03 Trimmer Knob can be installed on kobalt trimmer without any tools
•KST1040A-03 Bump Knob will keep your trimmer head feeding like new, ensuring very smooth running and the best performance for your trimmer
•3 Pack KTHA 1040-03 Bump Knob included,if you have any quality problems, please feel free to contact us,we will provide appropriate solutions within 24 hours

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$16.69

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THTEN

Thten KST 2224B-03 KLS 124-03 Trimmer Head Compatible with Kobalt 24 Volt KST 1124B-03, KST 2024A-03,KST 4024A-03,KST 4024AB-03 12 inch Straight Shaft String Trimmer with 0.080-in Dual String line

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Compatible with Kobalt 24-volt 12-in KLS 124-03,KST 1124B-03, KST 2024A-03, KST 2224B-03, KST 4024A-03.KST 4024AB-03 Straight Shaft Battery String Trimmer
•Kobalt Item number:856456,1157557,1137837,3488480
•The dual-string line feed provides great cutting efficiency
•Easy Line Replacement: Quick-load spool system makes reloading new string a breeze—no tools required for fast and hassle-free string replacement.
•Durable Construction: Built with high-quality materials for long-lasting durability, able to withstand frequent use without wear or damage.
•Reliable Performance: Designed to meet Kobalt's high standards, ensuring you get the best performance out of your trimmer for years to come.
•Enhanced Cutting Efficiency: Offers smooth and efficient cutting, perfect for maintaining clean, precise edges around your yard, garden, or flower beds.

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$26.99

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THTEN

THTEN KTHA 1040-03 Plastic Metal String Trimmer Bump Knob Compatible with Kobalt 40V KST 1040A-03 KST 1540-06 KST 1040B-03S KST 224A-03 KST 224B-03 KST 2540-06 KST-1341 KST 2580-06 String Trimmers

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Fits Kobalt 80V String Trimmers items 623432 and 620250
•Compatible with Kobalt 40V string trimmer KST 1040A-03 KST 1040B-03 and Kobalt 24V string trimmer KST 224A-03 KST 224B-03,KST 2540-06, kobalt kst 2580-06,Kst 1540-06,KST-1341
•KOBALT String Trimmer Bump Knob ensure compatibility and quality
•Model number :2908503.Item number:1315053,4665020,2127552
•Kobalt 0.080-in Plastic Line String Trimmer Replacement Head | KTHA 1040-03

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$19.99

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Cilivo

KLS 124-03 Replacement Trimmer Head Compatible with Kobalt 24 Volt KST 1124B-03, KST 2024A-03,KST 4024A-03,KST 4024AB-03 String Trimmer Weed Wack,Pre-Wound 0.080'' Dual String line

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•KLS124-03 trimmer head Compatible with Kobalt 24-volt String Trimmer Models: KLS 124-03, KST 1124B-03, KST 2024A-03, KST 2224B-03, KST 4024A-03, KST 4024AB-03
•KLS1124B-03 Replacement Trimmer Head Compatible with Kobalt Item number:1504979,1157557,1137837,856456,3488480
•For Kobalt KLS 124 Trimmer Head with High-quality ABS spool and durable polyamide nylon thread, Perfectly replicate the original important parameters flexible and long service life
•This trimmer head easy-to-load, reload and reliable accessory, which automatically feeds the trimmer line as needed during operation
•We are a professional seller of spool products, with high-quality OEM accessories designed specifically for efficient lawn care, helping you easily efficient complete lawn care
•Quality Assurance:If you have any quality problems, please feel free to contact us, we will provide appropriate solutions within 24 hours.

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$24.99

$29.99

-17%

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Kudoosen

Kudoosen KST-120X Trimmer Replacement Line Compatible for Kobalt KST 120x-06, 20ft 0.065'', 6-Line Spool + 2 Cap

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Spool Compatible with Kobalt KST 120X string trimmer and Kobalt 40V Cordless String Trimmer. Item number 506886 (model #KST 120X-06).
•Each spool is pre-wound 20feet 0.065"and you can quickly replace and use it.
•Trimmer Spool Weed eater dual line,feature provides faster and easier replacement spool functionality.
•Replacement trimmer head parts is made of high-quality ABS material, flexible and has a long service life.Spool is made of high-quality nylon material, which guarantees efficient cutting efficiency while guaranteeing durability.
•6-pre-wound of string trimmer Line Spool + 2 Cap

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$12.99

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