The RAM-B-166-UN8U consists of a 3.3" diameter RAM® Twist-Lock™ suction cup base, medium length double socket arm, and the popular spring-loaded RAM® X-Grip® 7"-8" tablet holder. The RAM® X-Grip® features an 'X' design that expands and contracts to provide a perfect fit for your device – even if it's in a case. Included are easy access grip knobs located on the back of the cradle for quick release of your tablet. No matter what double socket arm and mounting base you pair the RAM® X-Grip® with, RAM® ball and socket technology allows for near-infinite adjustability to achieve the ideal viewing angle – while also extending the life of your phone by providing shock and vibration damping. The RAM® X-Grip® tablet holder includes a device tether recommended for added security and peace of mind. This version of the RAM® X-Grip® holder is compatible with tablets that will fit the dimensions listed below. It is important to verify the dimensions of device with its case, sleeve, or skin when determining the overall size.