Non-Slip Clip upgraded with thickened rubber pad could lock the air vent firmly and stably. Suitable for most of air vent
looking at the clip to the air vent I'm not sure that it would hold the phone's weight. usually there is a little groove at the end to grip behind the air vent.
These need the lip on the pincers, to stop the holder from falling out.
I would avoid these.
I actually just bought this model via amazon for $15.99 (last week)
The pincers have enough friction when closed that it doesn't fall off - in my limited experience of 1 drive to work. Feels very secure to me.
Bought it to replace a model with a lip on the pincers I got from ebay that fell off constantly, I think because the pincers were too long to fully close when in my vents?
I found the same, but I would suspect that after a while it could loosen and slip.