ball n socket screw phone support

still wasn't wide enough to be really stable, the head part of the screw support the little tag bits printed as almost separate parts and fell straight off and it just didn't fit properly against the back of my phone.. .. if , as I did , you use a little thin grippy foam rubber on the disk that touches phone its even better.. I have loads sold as drone lipo battery foam to stop them sliding out the straps lol