Quick verdict
For BLACK+DECKER auto-feed trimmer owners, the genuine AF-100-2 OEM spool is the pick. It is factory-wound with 30 feet of 0.065-inch line, drops into the AFS system, and fits a long list of BLACK+DECKER models without hand-winding.
Black+Decker Genuine OEM Authentic Weed Eater String
This is the genuine BLACK+DECKER AF-100-2 spool, factory-wound with 30 feet of 0.065-inch line and built for the AFS auto-feed system, so it drops in without hand-winding. The listing covers a long roster of BLACK+DECKER models like the GH600, GH900, and LST series, making it the fit-guaranteed choice for those trimmers.
Check price on Amazon âBest trimmer spool replacements for BLACK+DECKER, WORX, and Ryobi auto-feed trimmers, from genuine OEM AF-100 spools to bulk value multi-packs.
Why you should trust this guide
Replacement spools are all about matching your exact trimmer, so I read each listing’s compatibility roster and note the line gauge and length rather than assuming one spool fits all. A spool that is a great value is worthless if it does not seat in your head, so I lead with fit and I am honest about which trimmers each option actually serves. The single most common mistake buyers make here is grabbing a spool that looks similar but is keyed to a different auto-feed system.
I also weigh genuine OEM spools against aftermarket bulk packs fairly, because the right answer depends on the buyer. An OEM spool removes fit risk entirely; a bulk pack cuts the cost per refill for someone who burns through line every weekend and does not mind occasionally tossing a spool that fits a hair loose. My goal is to point you to the spool that matches your trimmer brand and how often you actually reload, not to insist that either the cheapest or the most expensive option is best for everyone, because both extremes are wrong for plenty of buyers.
How we evaluated
My leading criterion is compatibility with your trimmer’s brand and model, since spools like the AF-100 and WA0010 are keyed to specific auto-feed systems and simply will not seat in the wrong head. I then look at line gauge and the length wound on each spool, because those determine both cutting behavior and how often you stop to reload. A spool holding 30 feet lasts far longer between swaps than one holding 10, and on a large yard those extra stops add up to real lost time and interrupted momentum.
I also consider whether the spool is genuine or aftermarket, how many come in a pack, and whether replacement caps or springs are included, since those small parts wear out too and can strand you mid-job with a head that will not hold line. Durability claims and tensile figures come from the makers, so I treat them as stated rather than measured, and I do not physically test these spools or claim to have run them through a season. I judge them strictly on documented fit, format, and design, which is what you can actually rely on when ordering a part you cannot inspect in person, and I say so openly rather than dressing up a spec sheet as personal experience. When two spools are effectively identical apart from price and pack size, I tell you that too, because pretending to find meaningful differences where none exist would only make the decision harder than it needs to be.
What to look for
- Compatibility with your specific trimmer brand and model, matched carefully to the listing’s roster of supported part numbers
- The auto-feed system your trimmer uses, such as AFS for BLACK+DECKER or command feed for WORX, since spools are keyed to it
- Line gauge, typically 0.065 for light residential trimmers or 0.080 for heavier-duty ones like some Ryobi models
- Line length per spool and the number of spools included, which together decide how long you go before reordering
- Genuine OEM for guaranteed fit and factory winding versus aftermarket for a noticeably lower cost per refill
- Whether replacement caps and springs are included, since those small parts also wear and can strand you mid-job
- Pre-wound convenience so you avoid the fuss of hand-winding line in the correct direction and getting it wrong
How we test
We base every pick on real-world use, published manufacturer specifications and verified owner feedback. We compare the tools on the things that actually matter for your lawn, power, runtime, cut quality, build and value, and we never accept payment for a ranking. When we have not used a specific model first-hand, we say so.
The picks at a glance
| Tool | Best for | Score | |
|---|---|---|---|
| Black+Decker Genuine OEM Authentic Weed Eater String | Best Overall | Check price | |
| WORX Replacement Spool & Line | Best Value | Check price | |
| Xgunion Trimmer Spool Line | Best Premium | Check price | |
| AF100 Replacement Spool | Best Budget | Check price | |
| Eventronic 0.080" Weed Wacker String Replacement Compatible | Also Great | Check price |
The picks, reviewed
Black+Decker Genuine OEM Authentic Weed Eater String
This is the genuine BLACK+DECKER AF-100-2 spool, factory-wound with 30 feet of 0.065-inch line and built for the AFS auto-feed system, so it drops in without hand-winding. The listing covers a long roster of BLACK+DECKER models like the GH600, GH900, and LST series, making it the fit-guaranteed choice for those trimmers.
Reasons to buy
- Compatible with: BESTA510, BESTA512, BEASE620, CST1000, CST1200, CST2000, GH400, GH500, GH
- Auto Feed System replacement spool eliminates time spent hand-winding string trimmers
- 30-foot replacement line is factory wound for a superior feed
- Utilizes centrifugal force for maximum performance
- Includes a 0.065-inch diameter line
Reasons to avoid
- The 2-pack holds less line than the larger aftermarket bulk packs
- Only fits BLACK+DECKER trimmers on its compatibility list
WORX Replacement Spool & Line
The WORX WA0010 6-pack comes pre-wound with the brand's DNA2 DoubleHelix line, a shaped profile WORX says reduces drag for a sharper cut, and each spool installs in seconds with 10 feet of 0.065-inch line. As the genuine WORX refill, it fits WORX trimmers without compatibility guesswork.
Reasons to buy
- HIGH-PERFORMANCE LINE: DNA2 DoubleHelix cutting line has a unique aerodynamic shape for re
- PRE-WOUND, READY TO GO: Each spool contains 10 feet of line, comes pre-wound, and installs
- 60 FEET OF LINE: Each six pack contains 60 feet of DNA2 DoubleHelix line to keep you stock
- DO IT YOURSELF. DO IT BETTER. DO IT WITH WORX: WORX tools are engineered with cutting-edge
- DESIGNED FOR WORX TRIMMERS: The specially engineered diameter of this line is 0.065 and is
Reasons to avoid
- Ten feet per spool means more frequent swaps on big jobs
- Engineered specifically for WORX trimmers, not universal
Xgunion Trimmer Spool Line
Xgunion's 14-pack is a bulk WORX-compatible option with 12 WA0010 spools plus 2 cap covers, using 0.065-inch line the maker rates over 100 pounds tensile and calls 30 percent more durable than other brands. It fits a broad list of WORX WG models and gives you a long refill supply at once.
Reasons to buy
- ăCompatible With Worx Weed Eater String Trimmeră:The trimmer replacement spool suitable fo
- ăEfficient Cuttingă: 0.065-Inch weedeater line use centrifugal force and aerodynamics to r
- ăAbrasion Resistantă: The trimmer line is made of upgraded nylon polyamide material that h
- ăMore Durableă: The spools are made of the latest materials to withstand the high speeds o
- ăPackage Includedă:Our great value pack contains 12 pack WA0010 replacement spools 0.065"1
Reasons to avoid
- A stated 100-pound tensile figure is a maker claim, not verified
- Aftermarket spools may fit slightly looser than genuine WORX ones
AF100 Replacement Spool
This AF100 aftermarket kit packs 12 replacement spools plus 2 caps and 2 springs, all wound with 30-foot 0.065-inch line and fitting the same wide BLACK+DECKER model list as the OEM spool. For heavy users it is the budget way to stay stocked far longer than a 2-pack.
Reasons to buy
- AF100 Trimmer Replacement Spool Fits for: BESTA510, BESTA512, BEASE620, CST1000, CST1200,
- Package included: 12 x replacement trimmer line spool; 2 x replacement cap ; 2 x replaceme
- AF-100 Replacement Spool AKA AF-100 String,af100 replacement spool,af100 string trimmer,af
- AF100 trimmer line ,for black and decker #af-100 ,for black and decker af-100-bkp ,for bla
Reasons to avoid
- Aftermarket fit and winding quality can vary versus the genuine spool
- Extra caps and springs suggest you may occasionally need to replace those too
Eventronic 0.080" Weed Wacker String Replacement Compatible
The Eventronic refill is engineered for Ryobi ONE+ 18V and 24V trimmers, using 0.080-inch twisted copolymer nylon that is machine-wound for jam-free auto-feed operation. The 10-pack includes spools and 2 caps, giving Ryobi owners a matched refill for the AC80RL3 line system.
Reasons to buy
- Universal Compatibility with Ryobi Models: Specifically engineered for a perfect fit, thes
- Premium Material for Enhanced Durability: Experience superior cutting strength with our hi
- Precision Winding & Jam-Free OperationïŒUnlike manual winding which can be cumbersome and c
- Seamless Integration with Auto-Feed SystemsïŒSpecifically engineered to match the auto-feed
- Complete All-in-One Replacement KitïŒGet everything you need in one go. Our comprehensive p
Reasons to avoid
- Built for Ryobi models, so it will not fit BLACK+DECKER or WORX trimmers
- At .080 it is a thicker gauge than the .065 spools here
What to look for
Match the spool to your trimmer brand
Spools are not universal. The AF-100 fits BLACK+DECKER, the WA0010 fits WORX, and the Eventronic fits Ryobi ONE+. Identify your trimmer's spool part number first, then buy the matching spool, because the wrong one will not seat in your auto-feed head.
Genuine versus aftermarket
A genuine spool like the BLACK+DECKER AF-100-2 guarantees fit and factory winding. Aftermarket bulk packs cost less per spool and keep you stocked for a full season. If you burn through line often, the value of a 12 or 14-pack is hard to beat.
Line gauge and length
Most of these spools use 0.065-inch line for light trimming, while the Ryobi-specific Eventronic uses thicker 0.080-inch line. More feet per spool means fewer reloads, so weigh the wound length against how much trimming you do.
Pre-wound convenience
Every spool here ships pre-wound, which saves the fuss of hand-winding line and getting the direction right. Pre-wound spools install in seconds, a real advantage over loading bulk line into an empty spool yourself.
Included caps and springs
Auto-feed heads rely on a cap and sometimes a spring that also wear out. Kits that include spare caps and springs, like the AF100 12-pack, save you from a separate order when those small parts fail.
Our verdict
For BLACK+DECKER auto-feed trimmer owners, the genuine AF-100-2 OEM spool is the pick. It is factory-wound with 30 feet of 0.065-inch line, drops into the AFS system, and fits a long list of BLACK+DECKER models without hand-winding.
FAQs
Check your trimmer's manual or the part number on your current spool, then match it to the listing. The AF-100 fits BLACK+DECKER, the WA0010 fits WORX, and the Eventronic fits Ryobi ONE+. Buying by brand and model number is the reliable way to avoid a mismatch.
Aftermarket spools like the Xgunion and AF100 packs fit the same model lists and cost far less per spool, which is great for heavy users. Genuine spools remove all fit risk and match factory winding. Both work well when the compatibility matches your trimmer.
Most use 0.065-inch line, suited to light residential trimmers, while the Ryobi-specific Eventronic uses thicker 0.080-inch line. Always match the gauge to what your trimmer head is designed to feed.
Jamming often comes from a spool wound in the wrong direction, line that is welded together from heat, or a gauge your head is not built for. Pre-wound, machine-wound spools reduce jamming, and matching the correct spool for your model helps the auto-feed run smoothly.
It varies. The BLACK+DECKER AF-100 spools hold 30 feet each, while the WORX WA0010 spools hold 10 feet each. Bulk packs give you many spools at once, so the total line supply depends on both the per-spool length and the pack count.