Amzer AMZ95631  Bicycle Bike Handlebar Mount Holder for Samsung Galaxy S4 GT-I9500 - Retail Packaging - Black The 360 swiveling head rotates the custom fit cradle and your Galaxy S4 to the perfect viewing position. Suitable for handlebars between 0.75 inches to 1.125 inch in diameter. Swiveling base with locking ring - enables the holder to be positioned and locked into place. Includes 2 rubber pads for an enhanced grip. Can also be used on golf carts and baby strollers. Easily transferable from one Bicycle to another Bicycle.