Easy install of the 6-blade on my old Troy-bilt (early 4-stroke trimmer), it rocks! I have a lot of thick blackberry bushes and small alder trees that sprout up randomly - it wipes them out! Much better than my old 3-blade (it was also a swing-type, but had serrated metal/plastic blades that would easily deform and break).Plus, it cuts thick grass ok. One thing though: do NOT use it near anything like fence posts or things that you'd specifically need to use a string trimmer for!