Excellent three part series of articles talking about the right tools required along with many side articles providing more details.

http://blog.cnccookbook.com/2016/04/19/can-figure-tool-use-cnc-mill-router-part-1-holes/

http://blog.cnccookbook.com/2016/04/26/can-figure-tool-use-cnc-mill-router-part-2-2d-profiling/

http://blog.cnccookbook.com/2016/05/10/can-figure-tool-use-cnc-mill-router-part-3-pocketing/