herb grinder for vaporizers with coating

http://www.mixnball.com ...Herb Grinder for using with a Vaporizers, what a cool little nice thing that it is. but it can also be tricky. how would you know which herb grinder to buy? there are so many herb grinders out there that it is so difficult to know which grinder will work the best for you or which one will serve you the best? vaporizers need small herb grinders but they also need a grinder that will do a consist grind as if not the whole thing will just not be vapord the way you want it to. when vaporizing the bits should be same to the extraction will work even and the flavor will remain the same threw the whole process. in any way a grinder should be safe to use, in this video you can see how mixnball makes a safe to use herb grinder, as for vaporizers - mixnball is the best herb grinder to go with.