This X Grip U bolt mount consist of a zinc coated U-bolt base, double socket arm and universal spring-loaded X-Griping cradle for smart phones. Included in this package is hardware that will accommodate bars from 0.50" to 1.25" in diameter. The base includes black cover caps to be placed over the exposed ends of the U-bolt. The spring-loaded X-Grip cradle expands and contracts, allowing for a perfect custom fit of your phone or tablet. The X-Grip includes a device tether, recommended for outdoor applications.