EFFICIENT GRINDER & FILTER : There are improvement sharp curved teeth with your herb spice grinder,make grinder smoothly and efficiently. STRONG MAGNET LID : The lid is magnetized ,keep lock during working and helps considerably to reduce spilling. HIGH QUALITY & DURABILITY: Made of premium zinc alloy,high quality material make your mini herb grinder durable. WIDE USAGE: With the improvement of the sharp curved teeth, the grinder can cut and flutter most herbs and smoothly rotates. It's better that the herbs are dry.