Besides Sweet Tooth's usual vibrant coloring and wonderful functionality, the 4-Piece Small Diametric Teeth Aluminum Grinder includes great locking mechanisms to ensure your herbs stay secure until you are ready to pack your bowl or roll up. While the top is held to the rest of the grinder by a strong magnet, the other three sections lock with one simple twist. No more fumbling with multiple pieces or constant turning. The flat rectangular teeth are anodized like all Sweet Tooth grinders so you will be using this one for the foreseeable future. Check out the many bright and beautiful colors Sweet Tooth has to offer when it comes to the 4-Piece Small Diametric Teeth Aluminum Grinder.