The Peak Design Motorcycle Stem Mount uses Peak Design's SlimLink magnetic/mechanical mounting system to hold a phone securely while riding, with a quick-release button for one-handed removal. Installation: Installs into most hollow-center steering stem nuts on sport and street bikes with clip-on style handlebars, using an expansion plug. SlimLink Mounting: Ultra-strong magnetic/mechanical SlimLink technology grabs and locks the phone in place, releasable with the press of a button even while wearing gloves. Build: Weatherproof machined and anodized aluminum construction with stainless steel fasteners. Case Requirement: Requires a Peak Design phone case or Universal Adapter, sold separately. Positioning Arm: A rigid adjustment arm lets you customize phone position and viewing angle, with attach/detach in portrait or landscape orientation. Vibration Isolation: Includes a best-in-class vibration isolator that protects the phone from road vibration while staying stiff enough to interact with the screen while mounted. Alternative Product: For bikes without clip-on style bars, Peak Design offers the separate Motorcycle Bar Mount.