Hamilton Beach Drinkmaster Milkshake Maker Drink Mixer Blade - Metal End.
This is a replacement if yours is lost or damaged. It is in very good used condition.
This one has a steel blade for mixing, not plastic.
Fits most of the later "7XX" series machines that use the ears on the shaft. (Shown in last photo). It will not fit the models that use the pin on the shaft.
