The blade fit tight and there was very little vibration. Besides, can through Youtube videos to use it. If you need to replace the blades, you must buy these sets of parts. Compatible: for Stihl FS36, FS40, FS44, FS55, FS55C, FS55R, FS55T, FS56, FS56C, FS56R, FS70, FS72, FS74, FS75, FS76, FS80, FS83, FS85, FS87, FS90, FS90R, FS94, FS100, FS110, FS110RX, FS120, FS130, FS200, FS240, FS250, FS260, FS460, FR85, FR85T, FR130T, FR220, FR350, FR450, FR480, FR410C, FR460TC, FSA90, FSA90R, FSE65, FS-KM.
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