Spring-loaded grip mechanism grips your device from the top and bottom and holds your device tightly.  Expands from 3.22 to 4.72 inches (82mm to 120mm).  Padded support legs on top and bottom of holder are fully adjustable left and right.  Coupled with a heavy duty mount that fits handlebar diameters up to 1.25 inches.  Includes rubber strips to protect your chrome handlebar from any marks.