Made of glass, ceramic, plastic, silicone and metal, this manual coffee bean grinder is portable and durable for long-term use. It's an ideal kitchen tool for grinding coffee beans quickly to make coffee in no time. Featuring a built-in adjustable coarseness mechanism, you can change or adjust the coarseness of the beans according to your needs, making it suitable for a range of coffee makers. The stainless steel handle with a strong thick black holder provides a firm grip while rotating, saving effort and time for effective grinding of coffee beans, nuts or other materials. This burr coffee grinder is easy to clean—simply disassemble all parts and wash them individually for next use. Equipped with a ceramic burr that doesn't produce heat during grinding, the storage jar preserves the original taste or flavor of the coffee for longer. It includes a large transparent glass jar to store fresh coffee beans, perfect for traveling, trips or family picnics—easy to carry and use. The adjustable mechanism allows easy coarseness adjustment by raising or lowering the locking nut, suitable for different brewing techniques: coarse grind for cafeterias, medium for flat filter drip coffee makers, and fine for cone-shaped drip coffee makers. Color as shown in the picture. Note: Please allow 1-3 mm error/1-3g weight error and actual product color may vary due to lighting conditions.