The IronCAD Mechanical (ICM) add-on is installed as part of the IronCAD Design Collaboration Suite package. The ICM tools adds many smart features and functions to IRONCAD, such as threaded holes and fasteners. But many other standard components can be found there as well. There is also an online manual with text, image and video content which you can find here: http://ironcad.it/learnICM/en/