Applications: 6 quart beater making cookie dough, creaming butter, mashing potatoes, whipping sugar and eggs to fluffy perfection, preparing frostings and pastry fillings, and much more. NOT suitable for KitchenAid mixers KSM657, all Costco, Sams Club Mixers, 5-quart bowl-lift mixer models, 5.5 quart models, 6 qt glass.