This mount consists of a yoke clamp base, double socket arm and a high strength composite cradle. The RAM yoke clamp mount will fit rails from 0.625″ to a maximum of 1.25″. Designed into the mount is a 1″ diameter patented rubber ball and socket system with adjustment points at the base and cradle. With a twist of the arm knob, you can move the yoke clamp mount to your optimum viewing position. The Tab-Lock holder is compatible with any tablet or reader that will fit the dimensions listed below. It is important to verify the dimensions of your tablet when determining the overall size. Holder Dimensions: Height: 6.55″ minimum to 9.8″ maximum Width: Maximum width to 5.68″ Depth: 0.125″ minimum to 1″ maximum Cradle Features: 1. Locking mechanism for theft deterrence 2. Compatible with multiple third party iPad mini skins, sleeves and cases 3. Support cups contain open slots to accommodate for tablets of various sizes 4. Back plate can support various size support cups 5. Spring loaded tension provides secure support for your tablet 6. Spring loaded cradle allows for quick release of your tablet 7. High strength materials maximize longevity of cradle 8. Full access to all ports 9. Lifetime warranty