The RAM-B-121-AP17 Apple iPad Air Yoke Clamping Aviation RAM Mount is a Marine Grade Aluminum Mount with a Temporary Clamp Base and RAM Custom Plastic Cradle. The mount is designed with a RAM 1 inch diameter patented rubber ball and socket system that has adjustment point at the cradle and base. With a twist of the arm knob, you can move the Apple iPad Air mount to your optimum viewing position.  Features: 1. Compatible with various iPad cable/docking accessories 2. Patented roller design for super smooth placement and removal of the iPad 3. High strength materials maximize longevity of cradle 4. Full access to all ports 5. Lifetime warranty