Using an adjustable grip, the MC-30 Phone/Camera 1.3' Clamp Mount with Phone Holder y Mini Ball Head Kit from Leofoto can easily attach to handrails, fence posts, and other similar rounded surfaces. Simply fold the knurled metal handle and twist it to open the clamp. The clamp can attach to surfaces up to 1.3' in diameter. Out of the box, this kit is ready to mount a smartphone, as it comes with Leofoto's PC-90 phone holder and MBH-19 mini ball head. Using the manual thumbscrew, you can open the PC-90 to hold 2.2 to 3.5' wide phones. The mini ball head gives you a variety of adjustment that you can lock in place with the built-in locking lever. A panning base knob gives you additional adjustment capabilities.