TomTom Universal Air Vent Mount Fits Up To 5.0" GPS Devices
Did not work for me
I liked the idea that this device attaches to the vent and it held my 3 1/2" Tom Tom well. However, apparently the clips that you attach to the vent are not strong enough because the next day when I went to my truck, I saw the whole thing on the floor and parts of the clip are somewhere in my vents. If the clips were made with a stronger material that would work.