Stingo has this to say:
This 4 part grinder is perfect for grinding your herbs/storing your herbs and collecting keif! As you grind your herb it falls into the second storage chamber which then sits on a removable mesh barrier allowing the keif to fall into the bottom chamber. The teeth on this grinder are extra sharp allowing an easy grind and 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. This grinder was manufactured by a CNC Machine (Computer Numerical Control) which ensures an accurate build and great quality.
Buy one now and be prepared for your next session!