Compatible with Black Decker: Compatible with most lawn mower models: GL280, GL301, GL425, GL430, GL545, GL555, GLC13, GLC2500, GLC2500L, GLC3000, GL4525, GL.4525S.B, GL5028, GL5028SB, GLC1423 L, GLC18 25L, GLC362 5L, STC1820, STC1815, ST4525, ST5530, STC1820PC, EPC, STC1840, EPC, ST1823, etc. Premium cutting cord: 9.15 m cutting cord for greater cutting reach, 1.65 mm diameter, durable and flexible polyamide nylon cord. Not easy to break, ensuring continuous work. Fast and clean cuts: The automatic feeding system for changing spools relieves the tedious work of manually winding spools. It uses centrifugal force and aerodynamics to reduce drag and achieve fast and clean cutting. PERFECT REPLACEMENT SPOOLS: They are perfect replacements for most original Black & Decker spool models such as A6481, A6485, AF-100, AF-100-3ZP, AF-100-BKP, AF-100-2. The spool can be plugged and unplugged without tools, and the operation is simple. At the same time, damage to the equipment is avoided and the