The replacement trimmer head adopts a special double-line design for mowing and thinning. The nylon line is adjusted by placing the replacement head on the ground. [Excellent Performance] With this grass trimmer head and using both trimming and up-and-down cutting, very convincing results are obtained even on brambles. [Easy to Use] The Stihl Autocut replacement trimmer head is used in combination with a 2.4 mm Stihl line, it is easy to install and use due to its high cost-effectiveness, high quality and low price, durable. Features: High quality replacement trimmer head for Stihl Autocut C26-2 FS 55/56/70/94/91/111/131/240. < p >The trimmer head is specially designed with double line for mowing and thinning. The nylon trimmer line adjusts automatically by hitting the trimmer head against the ground. It is used in conjunction with 2.4mm line, easy to install and convenient to use. High economic efficiency, attractive price and quality, durable for long-term use. Specifications: