Manual Coffee Grinder Set, Hand Crank Burr Coffee Grinder, Manual Coffee Bean Grinder with Glass Jar The quality of coffee depends largely on the freshness of the coffee powder. The best coffee beans are ground for a week and are not even comparable to ordinary freshly ground coffee, which shows the necessity of a coffee grinder. The product contains: 1 coffee grinder, 1 spare glass jar; Material: PP + high-quality silica gel + 304 stainless steel + high-quality ceramic； 1. It can be washed with water, and the general coffee grinder cannot be washed with water; the lower glass tank can store the coffee powder, which is convenient and time-saving. 2. Streamlined design, exquisite and generous, glass bottle body, intuitive appreciation, clear at a glance, let you enjoy the fun of grinding coffee. 3. The grinding disc design is more sturdy and durable. The thickness of the grinder can be adjusted and the grinding is uniform. 4. The design of professional ceramic grinding core and three forced blades makes it easier and faster to grind beans, the ground beans will not heat up, and the coffee flavor will not be lost. 5. An additional airtight canister is delivered, which can hold coffee powder of different flavors, which is more convenient to carry and suitable for enjoying delicious coffee on the go. 6. The removable anti-skid and anti-collision bottom pad is more convenient and safer. Note: 1. When grinding with a grinder, do not grind too much at a time, just enough for one use. 2. Coffee beans contain oil, so the grinder must be cleaned after grinding, otherwise the grease will accumulate and it will have a rotten smell over time. 3. During the grinding process, do not rotate too fast, but should rotate gently to prevent the grinding core from generating frictional heat as much as possible. Usage method: 1. Remove the nut, swing handle and L-shaped bracket in the center of the grinder in order; 2. Lift the center screw with one hand, and gently turn the gear-shaped nut piece clockwise with the other hand a little tighter. Be careful not to tighten too tightly to avoid damage to the internal structure of the machine; 3. Slide back the L-shaped retainer, and the long handle end of the retainer clamps the groove of any gear-shaped nut piece and uses this as the zero mark of the grinding degree; 4. Regard a groove of the gear-shaped nut piece as a grid; 5. Turn the gear-shaped nut pieces counterclockwise by 2 to 5 grids, and the grinding thickness is suitable for espresso machines and mocha coffee makers; Turn the gear-shaped nut piece counterclockwise to 6-8 grids, and the grinding thickness is suitable for American coffee machines, hand punches and filter press coffee makers; Turn the 9-11 grids of gear-shaped nut pieces counterclockwise, and the grinding thickness is suitable for plug-in coffee makers (siphon coffee makers); 6. The grinding thickness can be adjusted according to personal taste and brewing habits, the above description is for reference only; 7. After adjusting the grinding degree, put the rocker handle and the nut in order and tighten it to start grinding the beans.