This allows you to use an iPhone 11 with a Parrot Pocket Teleprompter. There is another version of this model for use with an "NTG Rugged Case" (the cheapest case I could find).
This model is slightly less good than my case version, as I switched to using it with the case before stiffening the rails and some other minor modifications, however it still works, so hopefully somebody finds it useful.
The author marked this model as their own original creation.