NEW AND IMPROVED DESIGN - We've made few improvements that make our grinder even better than it was before! That's because our product has very sharp grinding teeth that are perfectly positioned to grind every type of herb. Unlike other grinders that are made of cheap material that breaks easily and after a while the chambers become hard to open and get stuck, Our grinder is a well built grinder crafted from heavy duty zinc alloy. The high quality material makes the chambers open smoothly and easily, the teeth will always stay sharp and it will be easy to clean.