These embossing stamps are designed to work with polymer clay however, they can be also used on soap and pottery! The stamps have very sharp detailing edges and a stamp depth of 6mm. The stamps are made of PLA, a biodegradable plastic that comes from renewable resources. These stamps do not have a handle, so they need to be lifted from the clay/soap from the edges. However, you can easily glue them to a wooden block to create a handle. To avoid clay getting trapped in small and detailed places of the cutter/stamp, you can try dipping your clay in water or corn starch (or polymer clay powder) before pressing the stamp into the clay. Press firmly but very gently!