I just got into revolver shooting recently and after some research (my friend is doing the same thing so i just blatantly pilfered his results . ) I bought the one my friend picked out. It works great and is one tool for loading and unloading the moon clips as opposed to carrying around two separate tools like what came with the revolver I bought. Makes loading them really fast and easy.
http://www.revolversupply.com/documents/68.html
Enjoy!
Roadking