RAM Mounts Twist Lock Suction Cup Mount with Universal X-Grip (Black) The RAM Twist Lock Suction Cup Mount consists of a 2.75 inch twist lock suction cup base, double socket system and universal spring loaded X-Grip holder for cell phones. The suction cup, twist lock base is designed to have a strong hold on glass and non-porous plastic surfaces, including RAM adhesive disks. The mount is designed with a RAM 1 inch diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles. The included X-Grip cradle has a clean and clever four leg design that sports great holding power without hiding your phone behind foam pads and plastic. The spring loaded X-Grip holder expands and contracts, allowing for a perfect custom fit for all different kinds of mobile devices. The perfect complement to the modern sleek interior of today's vehicles, the RAM X-Grip is the cell phone holder evolved.*Retail Packaged. Holder Dimensions: 0.875""W x 3.25""H x 0.875""L Compatible With: Apple iPhone, iPhone 3G,iPhone 3GS, iPhone 4 White, iPhone 4s, iPhone 5, iPod Touch Gen 4, iPod classic Gen 1, iPod touch Gen 1, iPod touch Gen 2, iPod touch Gen 3 ;