You can hang anything you want, but small things are best of course. Quick to make and great for the cubical.I hang my GEEK key-chain on it. Geek key-chain from http://www.thingiverse.com/thing:4193You can hang your ring, desk key, etc....Print both parts, and insert arm into base. Little if any shaving of the base hole was required. After putting the arm in I put a dab of Acetone in the hole on the bottom just to make glue it in place.