The RAM Quick-Grip XL Phone Mount with Vibe-Safe and U-Bolt Base from RAM MOUNTS uses Vibe-Safe technology to dampen vibrations your phone experiences while mounted to handles on vehicles such as motorcycles, dirt bikes, and more. The U-Bolt connection clamps around bars 0.5 to 1.25' in diameter. Smartphones under 2 lb, 2.625 to 3.625' in width, and 5.75 to 8.25' in height will work with this holder. The NPT connection point allows for rotation between portrait and landscape viewing while maintaining security in rugged environments. An aluminum and high-strength composite build makes for a durable holder that will last longer, especially in outdoor applications.