Experience efficient and hassle-free gardening with the Kobalt 40V Max Bump Feed Replacement Spool. Designed to work seamlessly with both Kobalt and Greenworks string trimmers, this pack of eight spools ensures you're always ready to tackle your yard maintenance. The innovative bump feed feature allows for quick and easy line advancement, enhancing your trimming experience. The spools are compatible with the Kobalt 2905303 model and the Greenworks Pro 60V string trimmer case 0831145. Precisely engineered for longevity and performance, these replacement spools are an essential accessory for any gardener looking to keep their string trimmer running smoothly.