JOYCOLY Replacement Spools for Greenworks String Trimmers — 6-Pack 0.065in Auto-Feed, Blue, Tool-Free Install

JOYCOLY replacement spools provide six ready-to-install 0.065" single-line auto-feed cartridges plus a cap, engineered to fit Greenworks single-line cordless trimmers for fast, tool-free spool swaps.

If you own a Greenworks 24V, 40V or 80V single-line string trimmer and want reliable spare line without the premium price of OEM reels, these JOYCOLY spools offer a straightforward, budget-friendly option. Each spool is preloaded with approximately 16 feet of 0.065-inch nylon line and is designed to snap into place for automatic feeding during mowing. The pack includes six spools and one durable cap so you can replace worn reels quickly and get back to trimming.

Will these spools fit my Greenworks trimmer model?

JOYCOLY spools are made for Greenworks single-line trimmers that accept spool model 29252 and cap 3411546A-6. They match the size and mounting pattern used on many Greenworks cordless heads so installation is simple and secure.

• Compatible with Greenworks 24V, 40V and 80V single-line trimmers
• Known compatible model numbers include 21332, 21342 and several ST/ BST series units
• Preloaded spool shape and tabs match OEM 29252 spools for a snap-fit

How easy is it to change these spools when I'm out in the yard?

Spool replacement is tool-free and designed for quick swaps: press to release, lift out the empty reel, and pop in a fresh JOYCOLY spool. The auto-feed design eliminates bump-feeding, so the line advances automatically while you trim.

• Tool-less removal and installation — no screwdriver required
• Auto-feed action feeds line without tapping the trimmer head
• One cap included to secure the spool tightly during use

How durable is the trimmer line and spool material?

The cutting line is made from resilient nylon formulated for yard use, resisting frequent breakage and fraying when trimming grass and light weeds. The spools and the included cap are molded from sturdy ABS to hold the line under tension and protect the reel during operation.

• Approximately 16 feet of 0.065" nylon line per spool for extended runtime
• Sturdy ABS cap included to keep the spool secure and aligned
• Line thickness balances flexibility and cutting durability for general lawn maintenance

How does buying this 6-pack save money and downtime?

Stocking multiple preloaded spools means fewer interruptions while you trim and lower per-spool cost versus buying single OEM reels. Having spares on hand reduces the chance of stopping mid-job to reload, and the included cap replaces lost or damaged covers without buying additional parts.

• Six spools in one pack reduce repeated ordering and lower unit cost
• One replacement cap included to replace a worn or missing cover
• Prewound spools mean fast swaps and less time spent reloading line

Who is this for: Homeowners and landscapers who use Greenworks single-line cordless trimmers and want a cost-effective, ready-to-install replacement option. This pack suits anyone who prefers prewound spools for fast maintenance, those who want extra spools on-site to avoid downtime, and budget-conscious buyers seeking a durable alternative to OEM reels. If your trimmer accepts spool model 29252, JOYCOLY offers a practical way to keep trimming without delay.