do not believe the hype [SEP] this nozzle is called unbreakable but it is very breakable and it does not stay on my solia hairdryer i even had my fianc use a professional drill to put this thing on and still it kept falling off after the first one broke i thought maybe it was a fluke it broke for good after my sister used it on my nieces very thick coarse hair so i ordered another one the other one does not work any better than the first one i am very disappointed in this very expensive but ineffective product