Natural Oak Wood, Ceramic Rotor and Stainles Steel. Size: 8 inch. Use for peppercorn, sea salt, black pepper and more seasonings for camping, picnic, barbecue night and daily cooking, As a kitchen or table furnishing, it adds the joy to your life. Adjustable ceramic grinding core allows you to grind manually the seasoning from fine to coarse for your preference. perfect for all types of salts and peppercorns. Adjust the seasoning from fine to coarse by twisting the rotary knob on top. Unscrew and remove top nut, pour in peppercorns or sea salt and turn the top clockwise, Turn top nut to adjust from fine to coarse. For a fine grind, turn the nut clockwise. For a coarser grind, turn the nut counterclockwise.