About this 3D model
This metal blocker called ferma-imposte (how do you call it in English?) is used to keep the window shutters firmly open, especially with light wind. One in my house broke and I modeled this 3D-printer temporary replacement (I tried to fix the original one with epoxy but the end result was too weak). It is 100% compatible with existing holes and supports of the original part. Please be aware that plastic won't be as strong as metal, so use it just for temporary fixes.