Exactly, but without the use of numpad inputs. Really useful if you have a contraption that needs more than 16 numkey inputs. Hey, guys, how do I make a wire gun/tool? I've seen those factories, and they have guns that add hydrolics and wheels with hinges! Kay, I'ma make a simple sphere factory now. It'll connect two sphere halves with the use of grabbers, hydrolics, and the Wire Nail tool.
Neenja edit: You can make it do numpad inputs, Madmitten, which is very useful because there are tools (I.e. the Grabber) that don't come with GMod or are downloadable with a numpad input already set.