Arkon's Universal Heavy Duty Clamp Mount for Tablets features an innovative holder that adjusts to fit any 7" - 12" tablet and a 22" adjustable mount. The mount is extremely heavy duty.  Swivel adjustments at the base and holder as well as a third adjustment in the middle.  This comes with a C-Clamp that expands up to 1.75".

The C-Clamp base allows mounting on most flat-edged tables, desks, counters, or other flat-edged surfaces.

Fits many models including:

Acer Iconia A100

aPad

Apple:  iPad, iPad2, iPad 3 (The New iPad), iPad Mini

Acer Iconia A500

Amazon Kindle Fire

AOC Breeze

Archos: 101, 70

Asus EEE Pad Transformer, Transformer Prime

BlackBerry PlayBook

eLocity A7

Google Nexus 10

HP: Slate, TouchPad

HTC Jetstream

Lenovo IdeaPad

LG G-Slate

Microsoft Surface RT, Surface Pro

Motorola Xoom and Xoom 2

Samsung Galaxy Tab, Samsung Galaxy Tab 2 7.0, Galaxy Tab 7.0 Plus, Galaxy Tab 7.7, Galaxy Tab 10.1, Galaxy Tab 2 10.1, Galaxy Tab 8.9, Series 7 Slate, Note 10.1

Sony Tablet S

SuperPad

Toshiba Thrive

Velocity Cruz T301

ViewSonic: gTablet, ViewPad 10, ViewPad 7

Vizio 8