The RAM® Quick-Grip™ Pro XL Phone Mount with Motorcycle Fork Stem Base (RAM-B-176-A-PD7U) secures into the cylindrical bore wall of fork stems and features the next evolution of the RAM® Quick-Grip™ series, re-designed to be the most rugged universal phone holder that fits a wide range of phones and handheld devices.This phone holder features an integrated cavity for an 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 the Apple MagSafe puck is not installed. The RAM® Quick-Grip™ Pro XL features a spring-loaded design that allows easy one-handed insertion and removal of your device. Large and small shims are included to provide a snug, secure fit for large and small phones without a case. This kit’s included motorcycle fork stem base fits into the cylindrical bore wall of fork stems that that measure 12mm to 38mm (.5” to 1.49”) in diameter. 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.