. MODEL 5KHMFEB2 FLEX EDGE BEATERS The flex edge beater accessory was designed for Kitchen Aid hand mixers* to achieve better & faster mixing. They have a flexible edge attached in order to deliver 2 X the surface area contact with the bowl, as well as less noise and vibration.** It also reduces the need to stop & scrape the sides of the bowl with a spatula, compared to metal beaters. *KHM3, KHM5, KHM6, KHM7, KHM9, and KHMB7 Kitchen Aid hand mixer models. ** Compared to metal Turbo Beater II accessories based on cake batter. .