MAKIN'S-The Ultimate Clay Extruder Clay Core Adapters. The clay extruder has many uses: it can be used for all types of clay and with the included disc set you can create many different embellishments for your projects. This package contains three stainless steel clay core adapters: created to be used with metal clay but can be used with all types of clay. The Core Adapters makes it quick and easy to create long shaped beads. Extruder is sold separately. WARNING: Choking Hazard-small parts. Not for children under 3 years. Imported.