MAKIN'S-Makin's Professional Ultimate Clay Extruder Discs. These clay extruder discs are specially designed to work with metal clay and can be used with all of the Makin's Professional Ultimate Clay Extruder versions. Each of the design discs is made from stainless steel and has a 3/4 inch diameter, the exact size of the design varies from shape to shape. This package contains ten design discs. Clay Extruder not included. Imported.