The replacement cutter head features a special double-line design for mowing and thinning. The nylon line self-adjusts by tapping the cutter head on the ground. [Excellent performance] This mower cutter head delivers strong cutting results, even on dense vegetation such as brambles, whether mowing horizontally or vertically. [Easy to use] Compatible with Stihl Autocut systems and designed for use with a 2.4 mm cutting line, this replacement cutting head is simple to install and operate. Constructed for durability and reliable performance. Features: Premium quality replacement cutting head compatible with Stihl Autocut C26-2 models FS 55/56/70/94/91/111/131/240. Specially designed with a double line for efficient mowing and trimming. Automatic line feed function activated by tapping the head on the ground. Designed for use with 2.4 mm cutting line, easy to install and convenient to use. Durable construction for long-term use. Specifications: Condition: New Material: Plastic Color: As shown in picture Diameter: Approx. 15 cm Bottom Thread Hole Size: 10 x 1.0 mm – Left Hand Thread – Right Hand Shank Package List: 1 x Cutting Head