Bought believing they could handle anything. Well I was wrong, very wrong. Of the three jets, only one worked properly for the most part, the other two didn't work at all. Problems milling metal, lack of lubrication on the metal and the plastic joint doesn't really hold the brush head in place. The first was inserted into the system, it worked as expected. I had to replace the cleaning brush and then I noticed the problems. I put the second brush in the vacuum and after 2 minutes it stopped spinning. I quickly turned off the vacuum and replaced it with a third brush head only to not even let it spin. The ends detached so as not to see (I mean the absolute lack of lubrication between the metal bearing and the metal shaft, moreover the operation of the grinder was poor. I waited for the first to dry and then checked it. thin and not very good I wouldn't advise anyone to buy these products unless you plan to buy a new vacuum cleaner.