This aerospace grade aluminum alloy premium grinder has 27 razor sharp pyramid style teeth each with three serrated faces for even more slicing and dicing power in the palm of your hand. Perfect for pack, pocket, or purse - at just 1.8” (45mm) in diameter the discreet size, the sleek matte black finish, the smooth and easy operation, and the powerful magnetized closure make this 2pc herb grinder a perfect accessory for the heady human on the go. Get your grind on with your FLYTLAB Premium Grinder.