Vincent
Here are some pics of the snaps that I use on my larger plugs. I don't use them on my 7 inch plugs but for the 9 and 12 inch I like them because I believe that they keep the line from wearing at the knot and help the lure swing back and forth.
I also put a pic of the plug I caught my 15-12 on at San Pablo since I figured if I saw a fish that big I would want to see what the heck caught it!

http://www.calfishing.com/dcforum/User_files/39d026a3557e58e4.jpg

http://www.calfishing.com/dcforum/User_files/39d026cc59f3b546.jpg