Go Des GD-HD680 Magnetic back seat phone-tablet holder 360 degree rotating feature Can be used between 105mm-170mm Made of high quality aluminum alloy and ABS material You can easily attach it to the rear seat of your car with the adjustable latch, as well as E-Book or ultra thin LCD Built-in powerful spring system with a push-in design to be adjusted to different devices.Does not damage the front seat during use.