This is an adjustable phone mount for a car with shelve in the dashboard. Mount is wedged inside the shelve, phone position can be adjusted along two axis. Source file has parameters to specify shelve size and phone dimensions. I recommend to print lower base and screws with high fill density to make it more stable. It really depends if you phone is heavy and how much vibration you have in the car. My phone is heavy and I drive diesel truck, that required more stable lower base. Mount pieces fit very snug, I have been using it for last two weeks, it works great. Feel free to post questions. Happy printing