The coffee grinder uses conical ceramic burrs that will not produce excessive friction heat to maintain the original flavor of coffee. Turn the handle and you will feel the wonderful experience that only manual grinding can have. The grinder has 6 levels of grinding size adjustment, uniform grinding of different sizes. Whether you like Espresso, pour over or French press, this grinder can meet your requirements by setting a specific grind from coarse to fine. This grinder is very simple to use, only four steps: open the lid, put coffee beans in, adjust the grinding level, pour out the coffee powder to brew. About cleaning: wipe the outside of the mill with soft, damp cloth. You can clean the coffee grinder burr with a brush or rinse it ,then make the grinder dry quickly. The hand coffee bean grinder is compact and light weight. You can easily remove the hand coffee grinder's hand crank for portable carrying. Put the small hopper in your bag for traveling, camping, hiking, outdoors trip, backpacking or office etc.