Material: The trimmer head is made of aluminum alloy, which is wear-resistant and durable, and the cutting line is made of square nylon, which helps you mow the grass easily. EASY TO ASSEMBLE: We provide a complete set of aluminum trimmer heads, including installation tools and installation parts, and the installation steps are very simple. Nylon trimmer line for square mowing: The trimmer line is made of nylon, which is hard and sharp, and has a large cutting range, which can help you mow the lawn easily, saving time and effort. Easy to use: plug and play, just screw it in. Automatic threading is adopted, and the trimmer head is automatically adjusted during the threading process. Application: The trimmer head fits all common trimmers, left-hand lawn mowers, and is ideal for mowing and weeding. Product description The trimmer head has low vibration, wear resistance, and no noise to others. The specially designed aluminum trimmer heads fit most lawn mowers and are easy to use. The