The 4 piece Homegrown herb mill from Cali Crusher is one of the best on the market. The new design of the blades dosen´t only allow for a large loading capacity but also breaks the material down to the perfect mix. It is easy to use and it comes with a lifetime warranty. The grinder itself is made of aerospace grade aluminum so will take anything you can throw at it. Lastly the neodymium magnets will mean the lid never comes off unless you want it to. This really is a grinder for someone who wants the best of the best.