Grinding stone, jade, tools. Style: 80#, 120#, 150#, 240#, 320#, 400#, 800#, 1000#, 1200#, 1500#, 2000#, 2500#, 3000#. Size: Approx. With diamond coated material, more efficient than normal stone. Dry and wet, dry, water mill, water mill effect is good.
