Fits most Black+Decker trimmer models: GL280, GL301, GL425, GL430, GL545, GL555, GLC13, GLC2500, GLC2500L, GLC3000, GL4525, GL4525SB, GL5028, GL5028SB, GLC1423L, GLC1825L, GLC3625L, STC1820, STC1815, ST4525, ST5530, STC1820PC, STC1840, ST1823, and others. Quality edger line: 9.15M edger line provides greater mowing range with a diameter of 1.65mm. The polyamide nylon line is durable and flexible, not easy to break, ensuring continuous operation. Quick and clean cutting: The replacement spool with automatic feeding system eliminates the need for manual winding. Utilizes centrifugal force and aerodynamics to reduce drag and deliver fast, clean cuts. Perfect replacement spool: Designed as a direct replacement for most original Black+Decker spool models such as A6481, A6485, AF-100, AF-100-3ZP, AF-100-BKP, AF-100-2. The coil can be inserted and removed without tools for simple operation, helps prevent damage to the device and ensures optimal thread usage. Great value set: Package includes 8 replacement trimmer spools, 2 replacement caps, and 2 replacement springs. Coil cap replaces RC-100-P cap. Spring replaces RC-100-P spring. High-quality, cost-effective solution for extended use.