Round circular closed hooks/eyelets on a square base

I needed a simple small circular hook on a square base. Such a simple object, so difficult to find! After some search on ebay, I decided it was so simple, I could design and print it. I am sharing here the second iteration of my (modest) design efforts, maybe this thing could be useful to someone, as it was for me?

The base is 20 x 20 x 2 mm. Hook wall diameter is 3mm. Of course, the hooks can be scaled as needed.

No need for supports or rafts. The print in the picture was at 0.15 mm layer height.