All the sanding blocks I have seen are the nut and bolt type, but i found myself wanting something more of just a … block. No adjusting, loosening, tightening, moving, just wrap your sandpaper around an edge and go. So I spent 15 minutes in FreeCAD and made one. So far it’s working great.
In case anyone else wants it, or has feedback. https://www.printables.com/model/762884-simple-sanding-block
Don’t want to be a stick in the mud, but couldn’t that easily have been made from wood? (With less plastic waste?)