Clay cutters for polymer clay. They can be used in a variety of ways, such as for stud earrings or by dividing them in half. Purchased from the popular overseas shop, Roclayco. There are no remaining burrs or seams. The finish is very clean and of high quality. I bought these and collected them with care, but I'm selling them because I don't have a chance to use them. They are new and unused. Considering international shipping costs, this is a great deal. The 7th image is a sample of how they can be used.