My father needed a little cleat to secure the roof of an little DIY pool. We are using the semi flat version but attached are different styles, too.
If you want to manipulate the the clamp I've attached the Fusion 360 and STEP files. This should make it easier for you to play with the "design"
If printed with a PETG filament and it secures a roof of an little pool
You might want to sand the product to finish it up. I've used it as it is, because it's almost not visible to most of the people.