The RAM X-Grip Large Phone Mount with Vibe-Safe & Small Tough-Claw (RAM-HOL-UN10-462-400) is a combination of the RAM X-Grip Phone Mount with Low-Profile Small Tough-Claw and the RAM Vibe-Safe - our vibration damping accessory is designed to protect electronic devices from a wide range of vibration frequencies. The RAM X-Grip can rotate between portrait and landscape by loosening the center screw. With the RAM Tough-Claw base, easily attach the RAM X-Grip with RAM Vibe-Safe on round, square, and odd-shaped rails and bars ranging from .625" to 1.14" in outer diameter. This product comes with an optional device tether that is recommended for outdoor applications. The holder is compatible with handheld devices that will fit the dimensions listed below, it is important to verify the dimensions of your handheld device with a case/sleeve/skin when determining the overall size.