This package comes with a complete GS-12 grater/shredder and includes TWO disks (1/4″ and 5/16″ hole size). The package also comes with a VS-12KDS knife disk assembly to convert the GS-12 to a VS-12 vegetable shredder (complete with an adjustable “S” blade). This unit is made to fit standard size #12 mixer hubs or, the ALFA PB-12 power base.