Novoflex Universal Clamp with 1/4" Screw +
The Universal Clamp is a handy, compact solution for affixing a camera (with or without a ballhead) to akward scenarios such as tables, boards, pipes, car windows, etc. Two support platforms are arranged at right angles to one another, and both have a 1/4"-20 thread.
  Incredibly strong 
  Quick attachment/detachment from cameras/heads 
   Broad, rubber-based mounting platforms