The RAM-B-400-C-UN9-ROTO1U consists of the Tough-Claw rail clamp base, STANDARD length double socket arm and universal spring loaded X-Grip cradle for tablets. 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 toolless 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, the 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 RAM-B-400-C-UN9-ROTO1U comes equiped with Roto-View technology that lets you rotate your tablet up to 90 degrees for easy viewing in either portait or landscape mode. It is important to verify the dimensions of your handheld device with a case/sleeve/skin when determining the overall size.