Many bicycles and kickbikes are today made of aluminum or composite materials, with this antenna you do not have to mount anything around the frame etc that can damage the paint and frame. The antenna is also removable with a simple toutch, which means that you do not need to have the antenna mounted when you want to use the bike for other things. The antenna is made of plastic that is flexible and strong and the bracket is made of a piece of aluminum. The bracket fits 1 1/8 inch, which is almost the only one present. Can be ordered extra mounts and antenna as well. In case of uncertainty do not hesitate to contact us. Installation instructions can be found under the button "Tips and instructions" on the home page.