Suitable for mounting various size phones on bicycles and motorcycles. Clamp adjusts to handlebars and stems of various diameters from 16mm to 29mm (0.62" x 1.14") Fits mobile phones up to 9cm wide (3.55") 360 degree rotating support allows easy rotation between landscape and portrait. Get a grip， on your phone! This easy quick mount phone grip fits most bikes and motorcycles. It will accommodate most phone sizes too， up to 3.55" wide. Easy to install and simple to use.