Kousika Replacement Spools for Kobalt 40V KST-120X — 8-Pack (6 Prewound Autofeed Spools + 2 Caps)

The Kousika KST-120X replacement spool pack provides six pre-wound autofeed dual-line spools and two caps designed to fit Kobalt KST 120X-series 40V cordless string trimmers for quick, dependable line changes.

Keep your Kobalt 40V trimmer running with minimal downtime using these ready-to-install spools. Each head arrives pre-loaded with 20 feet of 0.065" polyamide nylon line in a dual-line configuration and is built on a robust ABS autofeed spool. This set replaces KST 120X (Item #651246), KST 120X-06 (Item #506886), and KST 2040-06 (Item #1520463) models, giving you several spares so you can finish yard jobs without hunting for parts.

Will these spools work with my Kobalt trimmer model?

These Kousika spools are manufactured to match the KST 120X family of Kobalt 40V trimmers. They are not a universal fit, so confirm your trimmer’s model number before purchasing. If your trimmer uses the listed spool model numbers, installation should be straightforward.

• Compatible models: KST 120X, KST 120X-06, KST 2040-06
• Not universal — verify your trimmer’s spool part number
• Designed for Kobalt 40V cordless string trimmers

How durable and easy to use are these replacement spools?

Each spool is molded from high-quality ABS for impact resistance and uses polyamide nylon line for improved tensile strength. They come pre-wound with dual 20 ft lines, so you spend less time loading and more time trimming. The autofeed design maintains line length as you work, reducing interruptions.

• Pre-wound 20 ft of 0.065" nylon line per spool
• ABS autofeed spool body for toughness and quick installation
• Dual-line configuration for efficient cutting performance

What’s included and how does this package save time and money?

This value pack contains six fully loaded spools plus two spare cover caps, so you have multiple replacements on hand for several maintenance cycles. Buying in bulk reduces the need for frequent single-spool purchases and ensures you’re prepared for heavier trimming tasks across seasons. The extra caps help if an original part is lost or damaged.

• 6 pre-wound autofeed spools (each with 20 ft of line)
• 2 replacement cover caps included
• Bulk supply avoids repeated small purchases and downtime

How do I install these spools and keep them performing?

Installation follows the same process as the original Kobalt head: remove the spent spool, place the pre-wound replacement in the housing, and secure the cover cap. To maximize spool life, avoid striking hard surfaces and replace worn line before fraying becomes excessive. Store spares in a cool, dry place to preserve line flexibility.

• Swap in place of original KST 120X-style spools — no rewinding needed
• Replace line at first sign of heavy wear or frequent breakage
• Store spools away from heat and prolonged sunlight exposure

Who is this for: Homeowners and landscaping pros who use Kobalt 40V KST 120X-series trimmers and want ready-to-install replacement heads to minimize interruptions. If you prefer having multiple spares for seasonal projects, value bulk packaging, and need a durable autofeed replacement compatible with specific Kobalt models, this Kousika pack is a practical, cost-effective choice. Note: confirm compatibility with your trimmer’s spool part number prior to purchase to ensure a correct fit.