Wallmounted tabletholder

This is a Tabletholder, that can easily be screwed to a wall or a cupboard. I printed it and it works as intended. If you look at the images, you need 2 screws with a large head to screw it down properly.
It keeps a tablet in the same place. I tried a Acer A3-A20 and a Huawei Mediapad and they both fit into it.