Perfect for cyclists who want security and accessibility to their compact electronic devices, the Rail EZ-ON/OFF handlebar base mounts a GPS, MP3 player, or cell phone quickly and easily onto your handlebars. Equipped with zip ties, the EZ-ON/OFF fits most common handlebar diameters. Ideally suited to the open road or trails. High-strength, lightweight composite construction makes for a durable, compact mount. Adjustable to allow for the best viewing angle. Will adapt to any cradle that contains a diamond hole pattern. Includes 12 degree tapered shaft for tapered handlebars.