The tablet holder is compatible with 7 to 11 inch tablets and connects to the Super Convi Clamp base through the Articulated Arm. The Articulated Arm has three 360 degree joints that allow you to easily adjust the position and angle of your tablet. The joints are equipped with tooth patterns at the center to provide solid locking mechanisms. The hex studs on the end of the Articulated Arm can be connected to the Super Convi Clamp. The Clamp can be securely mounted onto most rails or tubes with external diameters from 0.2 to 2 inches (5-51 mm). The included plastic saddle can be attached to the Super Convi Clamp to securely hold onto tables between 0.2-1.2" (5-30 mm) thick. The user-friendly Clamp is easily secured and removed efficiently. This set mounts a tablet within a flexible 22.5" (57 cm) radius.