Review on 📱 Universal Cell Phone Holder with Clamp for Bike, Boat, Car, Golf Cart and Stroller – iPhone X, 8, 8 Plus, 7, 7 Plus, 6s, 6s Plus, Galaxy S7, S6, S5 Compatible – Adjustable by Hartman Hernandez

Great phone holder that easily attaches to both square and round poles. Note 20 is the maximum size this holder will fit. You must mount the phone so that it is slightly raised so that the side mounting clips do not interfere with the side buttons. The only complaint is the attempt to turn off the corner bars quickly when you need to answer a call privately. If you want to use the speaker to make calls, no problem. I love this phone mount.