SharpStone herb grinders are constructed from premium grade aluminum to produce fine grinds without damages. Offering a mill style, clear-top design, SharpStone allows clear visibility with total control. The razor sharp grinding teeth are utilized by the precision cutting accuracy of the CNC machine for a smoother grinding motion and durability. To experience perfect cuts in your herbs, this accuracy is necessary. For the ultimate convenience, the handle securely folds up, and down.