Used to attach your SP Connect™ Phone Case with the simple 90 degree ''Twist to Lock'' mount; in a vertical or horizontal orientation; to most motorcycle handlebars. The CNC machined mount allows you to position the phone at the perfect viewing angle. The head offers up to -40% vibration reduction. Fits handlebar diameters from 7/8" (22mm) to 1.25" (31.8mm). Note: If you are using a smartphone with a mechanical image stabilizer; we recommend the use of the Anti Vibration Module (599508/599509); to prevent possible damage to your phone''s camera from motorcycle engine vibration.