The RAM® Quick-Grip™ XL Phone Holder with RAM® Vibe-Safe™ Adapter & Ball (RAM-HOL-PD4-462B) is a combination of the RAM® Quick-Grip™ XL Phone Mount with Low-Profile Small RAM® Tough-Claw™ and the RAM® Vibe-Safe™ - the vibration damping accessory is designed to protect electronic devices from a wide range of vibration frequencies. The RAM® Vibe-Safe™ is based on an NPT connection point and boasts the versatility to rotate between portrait and landscape while keeping your device secure in rugged environments. 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. RAM® Vibe-Safe™ dampens a wide range of vibration frequencies. NPT thread connection allows for rotation between portrait and landscape while remaining secure.