The Smartphone Mount from American Recorder Technologies is built using durable machined aluminum and a steel-threaded locking clamp that helps hold your phone securely in place. To further help protect your phone and secure it in place, the edges of your phone are protected by three large rubber cushions which are purposefully oversized to allow use with most phone covers. So that this mount may be attached to tripods and other accessories, there is a 1/4'-20 threaded hole in the base.