There are many desktop hook models here. They look great, but they're all too big or too sharp for me.

So I made my own. It's designed for boards up to 24mm thick. If you need a larger one, just scale it in the x and y directions.

I get the best printing results with PLA, using6-story wall、The top and bottom floors of the 10th floorAnd25% hexagon filling。No support is needed.

ABS, PETG, and ASA also work very well, even if the print isn't very thick.