X-Grip holder for small phone size: - Wide: 1.875" (47.6mm) to 3.25" (82.6mm) - Deep: max .875" (22.2mm) - Medium socket arm; 3" (76mm) ball to ball - ''Tough-Claw™'' base - Base clamps .625" (15.9mm) to 1.5" (38mm) diameter tubing / handlebars - Base clamps up to 1.14" (29mm) thick flat surfaces - Holds max. 2 lbs / 907 gram normal use or 1 lbs (454 gram) heavy duty use. - Includes: (1) Optional Tether; (1) Glue tube for rubber caps - Materials used: Marine-grade aluminum; high strength composite; stainless steel Consists of the Tough-Claw rail clamp base; SHORT length double socket arm and universal spring loaded X-Grip cradle for phones. The spring loaded X-Grip cradle expands and contracts; allowing for a perfect custom fit of your tablet. Included are easy access grip knobs for quick insertion and release of your handheld device. The Tough-Claw rail clamp base is the perfect mounting base for quick and easy tool-less installation and removal on round; square; odd shaped rails and bars. The Tough-Claw can be clamped on rails from 0.625" - 1.5" outer diameter. Perfectly suited for mounting on the yoke of an aircraft; handlebars and seat posts of bicycles; kayak rails; roll bars and much more; the RAM Tough-Claw will soon become another essential RAM component in your collection of mounting options. The X-Grip includes a device tether recommended for outdoor applications. The cradle is compatible with handheld devices that will fit the dimensions listed below. I