Herb grinders provide an invaluable service to smokers everywhere: they turn that chunked, gunky, sticky mess that good dry herb almost always is into a nice, fine powder that can be placed in bowls, papers, and pens. Without a grinder, uneven burning and difficulty lighting are just some of the problems smokers would face. Not to mention, grinders provide a wonderful resource in the form of keef – the powerful powder that some grinders separate and collect to top off a bowl. A grinder is an excellent accessory.