Its ridged design gives the user great purchase and gives the grinder a very ergonomic feel. On the base of each Prometheus Sifter Grinder is an identification number that is unique to each grinder.
The top 2 parts of the grinder contain the grinding teeth, the center part consists of a herb storage area / sifting net and the base part is for the collection of the sifted (most potent) part of the herbs.