This is a handle/grip which turns your phone into an action cam that you can hold and film while on the move. The cameras on phones are so good now who needs a seperate action cam? Print this and leave your GoPro at home. This is great for ski videos, hiking, walking in the city and recording. The handle is shaped to fit your fingers so you don't drop it. Requires two M4 x 30mm bolts and nuts and well as a couple heavy duty rubber bands. This has been tested and verified it works. When printing the handle put a large brim in it and up the infill near the top of the print for durability.