Attachment
thingiverse
Simple way to hang up your pictures or boards to your wall invisible. You have to drill a 25 mm slot for the attachment in you picture frame or your board. A screw with a 4 mm thread and a 9 mm head schould fit perfectly, a bigger screw will not fit in the attachment. First you have to screw the screw into the wall, after you placed the attachment in the board you can easily hang it on the screw.
Download Model from thingiverse
With this file you will be able to print Attachment 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 Attachment.