The extremely durable silicone rubber bands can hold the phone securely to the mount. Securely fits almost all phone sizes, large or small. No tool is needed to get this phone mount working for you. Simply pull the silicone bands over each corner of the phone and then just loop the strap around the handlebar and lock in a tight fit. Also it is very easy to take it off quickly when you are in a hurry. The cycling holder is made with super strong silicone that is dirt-resistance and washable. The soft silicone will never scratch or damage your phone. Using the tough silicone rubber, the cycling phone holder is able to grip onto your handle bars without any fear of it loosening or falling from its grasp over time.