The holder is made of black, hard plastic and looks stable also when one is I was curious at this low price and low weight, but you'd never have to. The bracket is universal and can be used for smart phones, Navis etc of a size of 1.97 inches to 3.94 inches (5-10 cm) are used. The installation of the bracket is very slight of hand, because the two parts are locked to each other a one click. One should before installing on the car windscreen or dashboard so that again clean the suction cup can be attached stably. The sucker runs via vacuum bombproof where you flip the lever attached to the windshield. This is a little more difficult to remove because it pretty stuck on the window and the tab is a bit small but there remain no residue on the plate or dashboard. I tested it with several squeeze phones like iPhone 5, Samsung Galaxy S5 or Samsung Galaxy Note 4. To insert the phone into the cup, you can take apart the two lateral holders with a button in order to optimally adapt to the phone with. To solve simply actu the button again and you can thus move apart the lateral holders again. The two owners have a foam coating which protects the phone from scratches and keeps it stable in the holder. The great advantage of this mount is that you can also use it with Bumper, Case or sleeve and is designed for a variety of mobile phone models. Ejne ausklabbare restraint is what stabilizes the smartphone again at the bottom. The bracket has 2 pivot with which one can find it in the desired position. It can move 360 degrees in all directions, as you can swing it, tilt and turn, thus you can also use it horizontally or vertically. At the processing or stability you can nix expose, although it is made of plastic, despite they still all vibrations or impact extinguishers. For the price of just 15 Euro you can do wrong absolutely nothing.