About This CNC Stainless Steel Pentagon Conical Burr - Hand Coffee Grinder is made of 420 stainless steel grinding core for extra durability. Double bearing center axis positioning makes grinding particles more uniform. Aluminum body for increased durability. This burr grinds coffee beans more efficiently. Excellent Grindability - The manual burr coffee grinder milling blade is made of 55-58 HRC hardness, which is machined by 5-axis CNC for uniform grinding with virtually no overly coarse particles and the generation of fine powder is minimized. Adoption of μ-grade precision fine grinding of the large axis has resulted in a significant increase in the precision of the center axis. Roughness Adjustment - Manual coffee bean grinder is precise to 24 clicks/loop and 0.04mm per click. Rotate clockwise for finer powder, and counterclockwise for coarser powder. Tips: Turn knob clockwise to tightest point to reset to original(Zero). By adjusting the nut, you can easily grind to the desired coarseness. 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. Weighing only 440g, it is easy to carry. Easy to Carry and Clean - Equipped with brush and storage pocket, easy to clean and store. Just simply clean the coffee grinder after use. DO NOT washable with water. The pocket stores the coffee bean grinder and can be taken anywhere. Suitable for camping, travel, outdoor activity, coffee festival. Notes for use - The numbers on the grinding discs are only used to memorize the number of compartments counted from the origin, and do not directly represent the specific degree of grind required. Cover the handle of the burr coffee grinder and hold it before turning the knob. Do not turn the handle after the knob has been reset to zero to avoid damage to the core. Overview Brand : MAVO Color : Silver Material : Aluminum, Stainless Steel Item Weight : 1.68 Pounds Product Dimensions : 6.69"L x 1.96"W x 6.1"H