7 mm nut driver
thingiverse
A basic 7mm socket wrench fits perfectly into either the compact M2 tool holder found on Thingiverse at http://www.thingiverse.com/thing:752346 or a standard nut driver.
Download Model from thingiverse
With this file you will be able to print 7 mm nut driver 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 7 mm nut driver.