For enhanced control, versatility and neatness, use tips with its matching Coupler (sold separately). Coupler allows the decorator to change similar sized tubes without emptying the contents of the Pastry bag.Works with any kind of pastry tube, including folded parchment, canvas and plastic.Rust Free. Carefully Crafted. Seamlessly Manufactured. Extremely Durable/Non-Malleable. Great Performance/Better Results.