Material:it is made of food grade 304 stainless steel, which is safe and reliable. Function:grind coffee beans, mung beans, nuts, peanuts, peppers , soybean, wheat, corn, cocoa, pepper, rice, etc. Detachable: the grinder can be disassembled into components, small in size and portable. Adjustable: can adjust the nut to change the fineness of the powder according to your needs. Simple: easy to use, can be clipped on a table up to 4 cm thick.