The Premium Beater Set adds whisking and creaming to the Assistent Original and works with the Ankarsrum Stainless Steel Beater Bowl (sold separately). It does not fit the plastic beater bowl that came with the older Basic Package. Owners of the current Essential Package, which ships without whisks, use it to whip cream and egg whites.
The set has two tools. Oversized balloon whisks sweep more of the bowl to build volume in meringue, sponge batter and buttercream, and they handle a single egg white. Cookie beaters of heavy-gauge wire cut chilled butter into flour for pie crust and cream butter and sugar for cookies.
Both tools snap into an enclosed beater housing, so changing from one to the other takes a moment.