This 4 part grinder is perfect for grinding herb, storing herb, and collecting keif! As the herb is ground it falls into the second storage chamber and sits on a mesh barrier allowing the keif to fall into the bottom chamber. The teeth on this herb grinder are extra sharp allowing an easy grind. The teeth can be filed to enhance the sharpness. The magnetised lid and thread ensures all chambers on the unit stay together and allow a smooth twist. This grinder is made of lightweight Aluminium. It has been manufactured by a CNC Machine (Computer Numerical Control) which ensures an accurate build and great quality.