The Nordic Ware pastry decorating set helps create beautiful cakes cookies and pastries for any occasion. Decorate cakes as easily as if you re writing with a pen. Simply fill bag with frosting insert into pen and decorate! the pen helps ensure precise control to make neat lines and boarders as well as provide clean starts and stops while decorating. The patented lever mechanism takes the pressure off your hands for an even flow of frosting or icing.