18 Pack Trimmer Spools, Compatible with Black and Decker Trimmers, A6481 A6485 1.65mm Strimmer Spools (12 Trimmer Lines, 3 Caps, 3 Springs) Automatic Spool Feed: Eventronic replacement spool compatible with Black and Decker weedeater is easy to use and automatically feeds the trimmer by centrifugal force, reducing the hassle of manually arranging replacement spools while you work. Abrasion Resistant: Compatible with BLACK+DECKER grass trimmer. The trimmer cord is made of upgraded polyamide nylon with a tensile strength of over 100 lbs, 30% more durable than other brands and lasts longer. Efficient Cutting: The compatible Black & Decker is pliable and flexible, allowing the line to stretch and cushion the impact of hard surfaces, and increases cutting efficiency by 50%, allowing each spool to cut more weeds.