Thread Setter / Rivet Nut Kit

I'm very intrested in the thread setter after using it on several occassions and would like to purchase one of my own. I have found it very handy in situations where welding a nut on would just get ugly. However, every time I look at a set to purchase it is never complete with every thing there to complement the other products that come with it. Example, it can set a klik,clinch,or rivet nut 6-32-1/4-20.Then only comes with 6-32,8-32,10-24,nose attachements. I have even saw one,(not this one) from 6-32 to 3/8.Wow, would really like to purchase that one. Guess what,No attachment for the 3/8 nose to insert into the rivet gun when you buy it. I don't really know much description on this set. Does it have all (4) threaded shafts for various sizes to set the nuts? If so, what material are they made of? Does it have an option to go up to 3/8? Is it a swivel head? If I wrong on this and the description is weak let me know,still intrested at this point and still have a few rivet nuts to set. Would like to have more info on this. Otherwise, it is a very facinating tool I will own. Thanks!