This professional mounting attachment will allow you to attach Ultimateaddons holders, waterproof cases and other device holders to your vehicle. On the top of the attachment is an adjustable ball with 3 prong plate, this can be adjusted 360° and also tilted to give you a better viewing angle. This attachment will attach to your vehicle handlebars / frame securely and can be used on a variety of bar diameters ranging from approximately 19-35mm