I'm pretty sure that they are for piped swags. Use them by making a "U", and it comes out as a ruffle swag.
hi what number is the frill tip thanks
I have a few. They're just marked 40, 50, and 70. They're now Wilton, no idea what brand they are
Sorry, make that "not" Wilton
I use this tip often. It makes a beautiful ruffle. You just go around the cake and it ruffles by itself. I took just a little practice. but once you get the hang of it its really easy. The slower you sqeeze the bag the fuller it ruffles.