❥Material: The trimmer head is made of aluminum, wear-resistant and durable. The trimmer line is made of nylon and the shape is square, which can help you cut the grass easily. ❥Easy to assemble: We provide a complete aluminum trimmer head kit, including installation tools and installation parts. The installation steps are very simple. ❥Nylon Trimmer Line for Square Mowing: The trimmer line is made of nylon, hard and sharp, with a wide cutting range, which can help you mow your lawn easily, saving time and labor. ❥Easy to Use: Ready to use, just tighten. Use the automatic thread to automatically adjust the trimmer head by threading. ❥Application: The trimmer head is suitable for all common brush cutters, grass trimmers with left-hand thread. Ideal for mowing and weeding.