?EASY TO INSTALL?The air vent clip for car adopts a rotating and telescopic disign,it is easy to install and remove. ?STRONGER AND DURABLE?The hook of the air vent clip is made of metal,it will be much stronger,much more durable than plastic hooks.The bottom of the clip is equipped with soft silicone pad,it will not damage the blades. ?STABLY,AVOID SWING DOWN?It hooks the blade of grille of air vent,two grooves can be supported a fixed position around the vent. Not only form a stable 3-point support,but also greatly reduce the torsional force on the blade,which prevent blades of grille from swing down,and prevent the holder and the phone swing down.It can also prevent the blade from being twisted.Even if the blade of some grille is loose,It can still provide stable support. ?FREE ADJUSTMENT AND ROTATION?Turn the outside small knob, the cantilever of the clamp can achieve 360 degrees of rotation,free adjustment angle, without blocking the outlet and driving vision, turn the inside large knob,the metal hook of the clamp can be freely telescoped,the clamp fastening and loose movement,adapt to a variety of outlet types, very practical. ?COMPATIBILITY?The Joint ball head diameter 0.67 inch (17 mm) and compatible with various car phone holders/wireless car charger mounts for car.The clip can be stably installed with the horizontal/vertical/inclined blades of grille.