Whether its whisking egg whites, mashing potatoes, or making yeast dough, the SB40US mixer is equipped to handle it. Two speeds provide power at the task-appropriate speed. Three sets of beaters combined with the two speeds meet all your mixing and whisking needs. The wire beaters whip, beat, and emulsify and are indispensable for egg whites, whipping cream, and making sauces. The flat plastic beaters are designed for mixing cookie dough and cake batters, mashing potatoes, and other traditional mixing tasks. The spiral beaters are used exclusively for mixing yeast dough.