The Stihl NOS Gearhead 41806400115 is a high-quality component specifically designed for use in Stihl string trimmers, such as the FS111RX and FS110RX models. As a genuine Stihl product, it ensures durability and reliability for maintaining your yard, garden, or outdoor spaces. With this gearhead, you can trust that your string trimmer will continue to perform at its best, making outdoor maintenance tasks more efficient and effective.