The RAM-HOL-UN10-400U consists of the small Tough-Claw base and universal X-Grip cradle for large phones and tablets. The X-Grip cradle has a clean and clever four leg design that sports great holding power without hiding your smart-phone behind foam pads and plastic. The X-Grip cradle expands and contracts for perfect fit of most smart phones.; Rotates 360 degrees and tilts for optimal viewing The X-Grip includes a device tether for added security in rough conditions Cradle expands to fit devices 1.875" - 4.5" Depth = 0.875" Tough-Claw clamps to 7/8" up to 1-1/2" handlebars Tough-Claw only 753-334 Individual X-Grip phone cradles 753-333 or 503-122 Teathers 832-377, 832-376