In itself, this part is to use well, so that you can achieve all kinds of "special effects" in vegetables. Since it especially with harder vegetables already needs to apply some pressure to the sliding direction, hold the suction cups but only partially, it is advantageous if you have three hands, or you work in pairs ;-)
Three different attachments, which can be replaced very quickly by pure sliding, the imagination when chopping vegetables have more leeway: endless slices or spirals, thick "spaghetti" or thin "spaghetti" - these are the choices.