Grass Gator 20155A 10-Count 0.155-Inch by 21-Inch Trimmer Line Replacement line for all gas and electric trimmers, including Ryobi, John Deere, Echo, Stihl, Homelite, Bolens, Weedeater, Craftsman, Toro, Cub Cadet, Troy Bilt, Honda, Poulan, Black and Decker, and most other makes Superior wear formulated using the highest quality copolymers to provide maximum line life Outstanding toughness engineered for ultimate impact resistance 5 cutting edges Directional aerodynamics always presents the cutting blade forward