General description The 18 Pack Trimmer Line Spool is designed for compatibility with Black and Decker strimmers, specifically models A6481 and A6485. This set includes 12 trimmer lines, 3 covers, and 3 springs, providing everything you need for efficient lawn care. The automatic spool feed system allows for easy use, as it feeds the trimmer line automatically through centrifugal force, minimizing the need for manual adjustments during operation. Technical specifications Trimmer line diameter: 1.65 mm Tensile strength: over 100 lbs Durability: 30% more durable than other brands Usage The trimmer line is designed for efficient cutting, being pliable and flexible. It stretches to cushion impacts with hard surfaces, which enhances cutting efficiency by 50%, allowing each spool to effectively cut through more weeds.