Print on the side for structural support. No supports needed. Only drill a 5mm hole and mount it to your existing folding ruler with a small zip tie.

Enjoy hooking cables or other objects from a distance. Dont't break your folding ruler anymore when hooking stuff. Mad cred to OSXtraveller for the great idea. There might be revisions, as I always are looking for potensial better solutions.

The model builds 1mm extra on the tip, and it is stilll not 100% fixed. As a precaution, take that into account if you measure with the hook side.

If you like it and want it permanently attached, two-component glue can be used. Just tell me, and I will redesign it without the side lips, and also a tad less wide, so the numbers can be used.