I use it for piping Buttercream Swirls onto my Cupcakes.
When used on cupcakes it gives a large fluted swirl - if that makes sense.
I have just uploaded a pic into *my photots* to show you.
That was my very first attempt -
The pic isn't showing up just yet - might take a few more Minutes.
I have copied and posted a link below for you.
Home page --> then Baking --> then click on Cookie Cutters.
If you scroll down you will set a set of round cookie cutters ($22.95) and under that a set of round CRINKLE cookie cutters ($31.95).
The Crinkle ones are the ones i used for the cupcakes that you see in my photos.
I just take out my cutters and get the closest match to the top of my cakes - cut out the right size - let sit for a minute or two to firm up then lift them with a long spatular knife and place them ontop of my little cakes.