First off, yes, we know, it's a magazine not a clip. It's THEIR name, not mine! That said, this...thing...ROCKS! I just got it today, and it loaded my Ruger Mark III mags in seconds! I can finally do more shooting than loading! Woot! It works on the same principle as a Hot Lips 10/22 magazine loader, except that the rounds simply fall into the Mark III magazine lickety-split. Three words: Worth...every...penny.