Why I love this Favorkit stainless steel Kitchenaid flat beater 

That gap looks a little bit high for thorough mixing. There is something called the dime test to see if the beater is at the correct height. Your mixer was made at some point after KitchenAid decided to no longer put a spring and washer on the beater shaft which helps keep your beater in good condition end without the spring beaters tend to wear prematurely. Mister mixer does sell a quick install spring and washer. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-wsYb-cArQqw.htmlsi=aERAvOkqNpqxcZIN