Curtain holder C

Curtains tend to fly when door is open, sometimes even hard and will destroy things on the table.
Used ropes before, but that wasn't handy

One day I thought to create a single print ajustible hook to secure my curtains so they wouldn't be flying in the wind when the door is open.

And it needed to be a easy to close and open AND strong part. So it ended up as two 270 degree rings which fit together and when becoming a ring; fairly strong.