Materials: cover ABS+pp+304 stainless steel Size: 7cm(2.75in) x 9cm(3.54in) Instructions for use： 1.Put the blades into the center of the bowl carefully. 2.Cut the ingredients into small pieces and put them into the bowl, don't put more or less, half is appreciated. 3.Cover it before chopping. 4.Hold down the lid with one hand, and pull the rope with another. 5.Pad on the table, take out the blades carefully, and then the choppers ingredients.