Calling all potters! This is a great, economical pottery bat set for throwing medium-sized forms. Throw and re-center lidded jars, bowls and other forms quickly and easily. Lift and replace inserts with the handy finger notch. If you'd like to use bat pins, this design includes standard 10" spaced holes. It is recommended to use a thin layer of clay or a batmate on your wheel head to keep the bat system firmly adhered during throwing. Have fun pottering!