A simple hook for IKEA Skadis board. Mounted using the T-Clip System by Line Arc Line. You can also use T-Clips mini by capze or Low Profile T-Clips by tchoupshop to fit flush. The clips come in two versions - one for black/white Skadis boards, and one for unpainted ones. (not included here; please download from the creator).
This one is the XS size, I have 4 other sizes (S, M, L and XL) available in my profile. I was only able to upload only one print file here.
I made a T Clip tool to make turning the clips easier, especially the flushed version.