About this item 45mm Self-Developed Burr - Original 7-axis Star-Tooth-45 grinding core（45mm）, the outer diameter of the grinding core is 45mm and the inner diameter is 37.5mm, reduce the thickness of the outer grinding blade to increase the size of the inner grinding core. The effective grinding size of the coffee grinder increased by 40% Innovative Quick Roughness Adjustment - Manual coffee bean grinder is precise to 120 clicks/loop and 0.0167mm per click. Adjustments can be made directly on the outer body without opening the powder compartment. Enables quick adjustment of the desired grinding degree Extremely Low Fines - The hand coffee grinder features original spiked core grinding blade structure. 160 spikes which puncture the coffee beans at the same time to make the grinding more efficient and reduce the extrusion between beans to reduce the formation of fine powder Ultra-High Precision Bearing: The central shaft stabilized by three bearings, with 3μm processing requirements, ensuring concentricity and stability during grinding, so as to ensures the production of homogeneous coffee. Suitable for any brewing method: Espresso, pour over, french press, cold brew, aeropress Excellent Labor-Saving Design - Features built-in bearings for smoother movement. Comfortable handle for light grinding with little effort. The non-slip body is compact and easy to grasp Easy to Carry and Clean - Equipped with brush and storage bag, easy to clean and store. Just simply clean the coffee grinder after use. DO NOT washable with water. The bag stores the coffee bean grinder and can be taken anywhere. Suitable for camping, travel, outdoor activity, coffee festival › See more product details