The RAM® Quick-Grip™ Pro Phone Mount with Medium Torque™ Base - Medium (RAM-B-408-75-1-PD5U) is a kit that installs to rails and features the next evolution in the RAM® Quick-Grip™ phone holder series. The phone holder is re-designed with a new, sleek look and integrated rubber side arms to provide a secure, no-slip hold on your phone. It features an integrated cavity compatible with the RAM® Qi2 Wireless Charger or the Apple MagSafe puck, allowing you to turn the phone holder into a wireless charging solution. Not interested in charging? No problem! The included anti-slip cover ensures a flush fit when nothing is installed. The RAM® Quick-Grip™ Pro features a spring-loaded design that allows easy one-handed insertion and removal of your phone. The adjustable side arms ensure that your phone will remain secured in the holder without blocking any ports or buttons. The RAM® Torque™ mounting base is compatible with rails 3/4” to 1” in diameter. Sizing inserts are included to provide a tight fit while also protecting the mounting surface. The RAM® Torque™ mounting base also includes nylon-insert lock nuts to prevent loosening in high vibration environments. The RAM® ball and socket system allows for articulation at both ends of the double socket arm creating almost infinite adjustment and perfect viewing angles. RAM® recommends installing the provided device tether when this holder is used in a vehicle with an open cockpit. It is important to verify the dimensions of your handheld device with its case, sleeve, or skin when determining the overall size.