The sieve cup and handle of the flour sieve are made of the best 403 stainless steel with a smooth mirror finish. The sieve is made of food safe 304 stainless steel. It is durable and safe to use.Spring press design makes our flour sifter more convenient than manual crank sifter. Semi-manual compression handle The handle features a semi-manual compression mechanism. You can comfortably operate the handle with just one hand. Press the handle and the flour will pass through the sieve automatically. super convenient! It can be operated with one hand. Sift flour at the touch of a button, making baking at home even more fun.This is a large-capacity flour sieve that saves time and effort and makes baking easier.Ideal for sifting flour, bread flour, cake flour, coconut flour, almond flour, tapioca flour, flour sifters, gluten free flour, chestnut flour, cocoa powder shakers, confectionery spice powder, rock sugar and all other powdered products.Versatile and easy to clean, our rock sugar sifter is super easy to clean. Just soak it in water and give it a quick scrub with the provided cleaning brush.