This tool is fantastic. The name is a misnomer, I have never touched a PAX (I am sure they are fine) but this is fantastic for loading almost every device I own. Great for measuring out a consistent dose.
I know a lot of folks prefer this to not be magnetic, but I would kind of like it if it stuck to the grinder. I sometimes forget to pick it up after a session.
Anyway, one of the most useful tools I own, although may be slightly expensive. Highly recommended.