This clay extruder is easy to use with all types of clay. Once the clay is conditioned, unscrew the cap and place the selected disc inside the extruder cap and screw the cap onto the barrel. Unscrew the top of the extruder and place the clay inside the barrel. Once ready, turn the trigger to start. Be sure to clean the extruder and disc after each use with soap and water. Contents:1 clay extruder20 unique designed discs3 rubber washersStorage case