The Stihl AutoCut C 6-2 trimmer head is designed for easy loading and efficient trimming. Fits Stihl FS38, FS40, FS40C, FS45, FS46, FS50, FS56, FSA60R, and FSA86R models. You can reload the trimmer line without disassembling the head, Adjust the nylon line length by tapping the cutting head against the ground.