The RAM Tough-Strap is lowest profile rugged mounting solution for any bike or motorcycle handlebars. With two different size straps, easily install the RAM Tough-Strap on any mountain bike, road bike or e-bike with a simple twist of a knob. This RAM Tough-Strap Handlebar Mounting kit includes a short length RAM B size socket arm and a RAM Quick-Grip phone holder for standard size cellphones. The long strap is used for bar diameters ranging from 1.25"-1.38" while the short strap is used for diameters ranging from 0.875"-1". Utilize the extra rubber strip to cut down to the diameter range of 1"-1.125" for a more custom fit. Take the RAM Tough-Strap on your next adventure on and off the road.