The holder in my truck slides into the CD player slot in the dash (holds surprisingly secure) - then has a ball socket which I have torqued tight, because I can just pivot the phone on the magnet if rotation is needed.
The magnet is STRONG - like hall effect sending unit strong. It
can be removed with one hand if you tip it
just right... or risk pulling the whole works out of the CD slot. But I'd rather have it secure.
I have a simple basic silicone rubber (slip on) "case" in my Pixel phone.
https://www.spigen.com/collections/p...39968780615727
The magnetic holder came with a 2" x 1.5" very thin 3M adhesive backed metal plate - which I stuck about the center of the case.
It has worked VERY well in any orientation... I adapted another holder in the RV to work with my setup.