Smartphone 360° Clamp-Style Holder for iPhones and Androids from 2.25 to 4 inches on 3rd Arm or Robo Arm Mounts

360 degree rotating phone holder for portrait mode (vertical) or landscape mode (horizontal) Hold any smartphone steadily with or with out a case(tripod) The screw secure with a tight grip and will not damage the exterior Multiple mounting locations meet your various needs Suppports mobiles phone from 2.25  to 4 inches (58mm- 101mm), international standard screws 1/4 interface