The advanced technology 4 piece grinder combines both durability and functionality to finely grind tobacco and dry herbs. The top layer is made from a triple layer of nickel and copper with a strong magnet. The tooth section has a square tooth instead of a sharp tooth and you will get consistent grind. In the herb chamber, a precisely woven non-fraying stainless steel screen contains. The high size of the microns in the steel screen in the Pollen chamber will have fewer impurities.