STABLE AND SAFEEowihor bike phone holder built-in steel rod in the joint ball, no more fear of breaking, and silicone contact surface protects your phone from scratches. The unique design of this holder holds the phone firmly and prevents it from falling off while riding, even on bumpy roads. EASY INSTALLATIONIt only takes 1 second to install or remove the phone! Hold the arms and push them inward to expose the knob on the other end, and turn the knob to adjust the width of the motorcycle phone mount to fit the size of the phone. (Important note: Make sure there is enough room for your phone. Otherwise, excessive clamping force will damage the phone). UNIVERSAL COMPATIBILITYSuitable for smartphones from 4.0"-7.0" and case thickness 0.6". The bike phone mount has two ports and includes 4 silicone pads, you can increase or decrease the silicone pads according to the diameter of the handlebar 0.78"-1.57". SHOCKPROOF PROTECTIONBicycle phone holder