Couplings—or couplers, if you prefer—are essential to cake decorators and bakers. They help attach decorating tubes to pastry bags. The plastic couplings in this two-piece set are large and small standard decorating couplers. The 2-piece icing coupler set will attach most decorating tubes to most pastry bags, making it easy for you to switch decorating tips as you work. Make sure you have these essential cake and pastry decorating tools readily at hand with just one set.