The spiral mixer is a single purpose mixer used only for bread and pizza dough development. The smaller spiral mixers, single phase, only have one speed. Most 3 phase spiral mixers have 2 speeds, slow and high speed. Spiral mixers are the preferred mixers of the bread bakers, and pizza makers of Europe. Many bakers see the spiral mixer as the choice that allows speed of production while maintaining control of oxidation and good treatment of the dough.