This will make a clickable link in the description that will open a new window with links to the CAD files. Copy and paste the following line changing insert text here to your description. <a href="http://www.a-sp.org/contents/publications/assemblyCAD.htm" target="_blank">INSERT TEXT HERE</a> Example: PDF changed design and <a href="http://www.a-sp.org/contents/publications/assemblyCAD.htm" target="_blank">CAD files changed to reflect revised construction details</a>