Zotoon Manual Ceramic Burr Coffee Grinder - Best Hand Coffee Bean Mill - Aeropress Compatible PORTABLE - The small size make it easy to travel with this coffee grinder. DURABLE Made of high grade stainless steel which will increase the durability of coffee mill. ADJUSTABLE - Just simply turn the knob clockwise or counterclockwise to adjust your grind size. CERAMIC BURR - Provide the most consistent grind,give your offee the balanced flavor. FAST - One minute from start to enjoy.