Some time ago I decided to customize the door of the room where me and my friends use to play RPG, so i started adding some wood planks, fancy lasercut hinges and other stuff, but I could not find a nice solution to replace the original handle. 

After some time and thinking I came up with this 3d printed handle and I'm very happy with the result. It is designed to fit a standard 8mm square spindle.

You'll find 2 plates, one containing the part which has to be fixed on the door (which can be printed in place), and another containing the handle main ring which must be assembled to achieve the final result. I chose to print it in PETG to achieve more strength since my door had a very hard spring, but I think that PLA or PLA+ can work fine as well.