V Block
thingiverse
A straightforward 3D model is required, a simple rectangular shape suffices. If you're interested in something more complex, take a look at this design instead: http://www.thingiverse.com/thing:584470 Here are the step-by-step directions: Ensure the V block receives at least a moderate 35% hexagonal fill level and 50% fill for the clamp portion. You'll also need to use a standard 1/4 inch hex nut on the clamp assembly.
Download Model from thingiverse
With this file you will be able to print V Block with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on V Block.