cut a 1" piece from an old piece of water hose. Make a slit in it so you can wrap it around your handlebar. Now place the bracket on over the water hose and tighten it down. Depending on the size of the bracket and the size of your handlebar, you may need a second piece of water hose with a slight overlap. I did this on my cell phone mount and it hasn't budged a single millimeter in over 800 miles.