Don't forget to remove the plastic film from the file...
These work great! cut like butter, especially when trimming right after a bath or shower.  The film on the file (blue film) can be an issue to remove.  Here is a pro tip.  Put it in the freezer for a couple of minutes.  It only takes like 2 minutes and this will shrink the plastic enough so that it will come off like magic.  Just remove it from the freezer, wait 20-30 seconds until you see condensation (fogging) on the metal, then peel it right off.  Easy-peasy.
Rating: 5 stars