Grind your weed or herbs with a wooden grinder. Every grinder has a unique natural appearance. The cannabis is crushed by metal pins. These will grind your weed buds grind a little less fine than with an acrylic or metal grinder. This is considered beneficial by some. For example when smoking a weed pipe or bong, or when vaporizing your cannabis. If you prefer to use a weed grinder that finely grinds your cannabis and is also very durable. Then it's best to buy a metal grinder.