I was getting pretty frustrated finding the right phone mount. This one is the Best phone mount I've had so far. Used both magnets on inside and outside of my thinnest Google ™ case for my pixel 3 XL. I have it on my middle vents in my Subaru WRX. I drive well, but quickly- so the magnetic power holds up to the test of 278lbs-ft of torque. I didn't get the circle shaped magnet (just 2 small rectangular ones despite what package entailed) but I don't care - was cheap and works the best.