Finger hook
thingiverse
If you don't like my version try this one: http://www.thingiverse.com/thing:116649 Instructions 3 shells 1.5 infill no support
Download Model from thingiverse
With this file you will be able to print Finger hook 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 Finger hook.