Review on 💪 Universal Smartphone Mount Holder for Tripods and Stands with 1/4" Screw, Vertical and Horizontal Rotation by Ruben Jamrock

I had the same problem, another reviewer mentioned that the knob falls off every time I try to tighten it. This happened the very first time I tried to use it so I'm pretty sure I didn't break it :) Gave it two stars because otherwise it looks like a decent design and from other reviews it seems it does not to work. does not appear to be a general deficiency. I'll try gluing the handle to the post and hope it holds tight enough to save it.