The offset base makes attaching to a variety of mounting locations, including handlebars, a breeze. Simple to install and easy to use, the possibilities become endless. Rubber ball and socket technology allows for almost infinite adjustment and perfect viewing angles. High quality materials insure your Apple Touch is safe, secure, and within easy reach. RAM’s patented design also dampens shock and vibration helping to extend the life of your mobile device. With a turn of a single comfortable to grasp knob, adjustments can be made and the sleek hourglass shape of the arm assembly compliments the lines of any motorcycle. Cutting edge products like the Touch deserve a cutting edge mount and RAM delivers. The hole in the mounting base measures 11MM in diameter.