- Premium zinc alloy material, precisely machined on computerized machines. - Four piece grinder with micron stainless steel mesh filters out pollen. - Optimum 2 inch size, grind the herb you need in one go. - Super sharp, well designed, correctly placed teeth for the best grind, does not rip or shred. - Powerful Neodymium magnets keep the lid on and leftover herbs fresh and odor free. - Balanced weight, correct size and thickness of grinder and teeth. - Tough and reliable, lasts forever. - Smooth grind, less friction.