One of the most popular styles of grinder is the multi-piece herb grinder. This style has a few moving pieces that grind, as well as serve up storage for your favorite dry herbs. These grinders are the most useful and easiest type to grind flowers or tobacco.
The two-piece herb grinder is the top choice. It has a top grinding piece that is twisted to fully grind herbs. There are also mechanical grinders that grind your herbs with a simple push of a button, and there are four-piece herb grinders as well.