【Dual Line Design】The Stihl Autocut replacement trimmer head features a special double line design for mowing and thinning. The nylon thread adjusts automatically by placing the replacement trimmer head on the ground. 【Excellent performance】 With this trimmer mowing head and using top-down mowing or mowing techniques, very convincing results are achieved even on brambles 【Easy to use】 The Stihl Autocut replacement cutting head is used in combination with a wire Stihl 2.4 mm, easy to install and use thanks to high economy, high quality and low price, durable. Features: Cutting head High quality replacement for Stihl Autocut C26-2 FS 55/56/70/94/91/111/131/240. The trimmer head is specially designed with double thread for mowing and thin. The nylon thread adjusts automatically by placing the cutting head against the ground tapped. It is used in combination with 2.4mm thread, easy to install and convenient to use. High cost-effectiveness, attractive price and quality, durable for long