The Four-Leaf shaped cord decreases the noise level. Therefore it is ideal for use with low noise cordless brush cutters line trimmers. Increased work amount per charge due to the Four-Leafed shape that has less air resistance than round nylon line. Features Ideal for use with low noise cordless brush cutters line trimmers Increased work amount per charge Suitable for DUR181 line trimmer and the rest of the Makita Brush Cutter Grass Trimmer models Twin Pack