Hi all, I do appreciate in advance for your help. I have some files in formats mentioned in subject of this post which are free downloadable 3d models in GRABCAD websie. I need them to in auto cad 2013 or 2012 format (.dwg or dxf) or any other format like .iges so i can import them into auto cad. I've searched a bit on google to find a converter but I could not. So I am asking for a free converter or any body can save them as a cad file for me.