Review on 🏌️ ZOEA Golf Swing Training Tool: Cell Phone Clip Holder for Quick & Easy Set Up with Clubs, Flag Stick or Alignment Sticks by Matthew Riley

Exactly what I wanted. Comes with two different rubber inserts so it fits almost any pole diameter. I put a large rubber insert in a 1/2 inch diameter rod and it worked fine. It looks like it will adjust fully to 1/8" with a smaller insert. The portion of the clip that holds the phone extends to about 4-1/2 inches. Thus, it fits in almost any phone size. It's also a fairly strong spring so it holds the phone securely. You can move the corner of the phone and tighten it securely. For $10 I think it's a good deal.