This is a Zhishang Stainless Steel Cookie Press and Icing Set. 
Functionality: It is used for making uniformly shaped cookies and decorating pastries with icing. 
Material: The main body and icing nozzles are made from 304 stainless steel. 
Components: The kit includes the press "gun" mechanism, various interchangeable cookie discs, and eight icing nozzles. 
Usage: The dough is placed inside the tube, and pressing the handle extrudes the dough through a chosen disc or tip onto a baking sheet. 
Ease of Use: All parts are removable for easy cleaning, and it is suitable for both beginner and experienced bakers.