KS957B is the ideal solution to transport your smartphone on motorcycles, scooters, bicycles, quads and other means of transport; The fixing system, compatible with tubulars of diameter between 8mm and 35mm and with the possibility of embracing even not perfectly round sections, allows you to be able to use this practical accessory also on vehicles equipped with handlebar with a diameter greater than the classic 22mm or on the stems rear view mirrors. Thanks to the patented hooking system, hooking and unhooking the smartphone door from the fixing system is a really simple and immediate operation (we speak of fractions of a second); By locking the ring on the fixing support, you can adjust the position of the smartphone door according to your needs at any time and without the use of tools.