This is the best brushcutter attachment on the market bar none. Its easy to attach, its easy to use and it cuts small trees like a hot knife through butter. It shipped ready to use with good, easy instructions and sharp. Also includes a file to keep it sharp. I have used it extensively for 20 hours without any sign of needing a tune up. Cleaned the teeth with a cleaner (not included) to remove some pitch and back to work it went. It has good balance on my Husqvarna 325X which is contractor grade...