E-Z deco icing pen works with a standard size decorating bag and all size decorating tips . Swiss-Designed, battery-Powered frosting deco pen gives you precise control for amazing effects-Writing, borders and shapes dress up store-Bought and home-Baked goodies like a professional beautifully decorates cakes and cookies in minutes fast, easy, fun and mess-Free the battery-Powered unit handles just like a pen, simply push down on the yellow lever to dispense frosting in two speeds - Fast or slow. An easy-To-Use tool for customizing cookies, cakes and other home-Baked treats. Our deco pen is a c Inch to use - Just fill it with colorful icing, then have fun decorating everything from home-Baked cookies to cupcakes. 1.Simply fill bag with frosting, insert into pen and decorate! 2.Ergonomic design ensure precise control and makes for neat and clean starts and stops. 3.Dispenser all of the frosting in the bag with light figuring pressure and no need to squeeze firmly .