These assorted 4 piece grinders reduce even those most tenacious and sticky of herb to granulated goodness. Each of these metal grinders combine 4 pieces to create 3 chambers, allowing for kief catching ease. High quality aluminum adds a durability to these weed grinders while their sleek design makes them perfect for portability. Their tight structure also finds these herb grinders doubling as unassuming storage for your medicine. Cleaning and maintaining these grinders is easy as well since they disassemble into 4 individual pieces.