If you already have
Revit 2012 thru 2017 installed
(add-ins will not work with Revit LT) you can follow the steps
Free KCL Toolbar Add-In for Revit
Uploaded - May 26th, 2016 (v3.9)
Instructions for KCL
Open your Revit project
and then click the "KCL" or "Add-Ins" TabMenu.
"KCL 5 Catalog" button.
Click Login or Sign up (from the upper right corner) to
create a free 14 day trial login.*
the "R" button on the 2d, 3d or rfa view you wish
to load into Revit.
If you want, add KCL
5 Catalog to your Quick Access Toolbar
that will make
KCL one click access!
trial includes full usage (login is never required for Free access from manufacturer web sites)
Also check out Custom
Blocks toolbar in KCL 5 Catalog, over 100 programs to
create custom 3D symbols.
KCL requires the latest services packs for Revit 2012 for full functionality of AutoCAD converted and native Revit families.
Revit 2012 service pack 2