Drum lid has 75 mm wide mouth with tongue! A tongue? Yes, it is what the manufacturer calls the “rib” but it looks like a tongue that is built into the wide opening.
This “tongue/rib” is a safety requirement by Korean authorities, and is a safety feature by the manufacturer, to prevent wandering hands from reaching the crushing gear. The knife is sharp enough to cut any fruits with a gentle force using the pusher, yet it is not sharp so as to cut your hand.
This tongue stops whole fruits from entering the chute all the way. A gentle push using the provided food pusher easily cuts the fruits into two that eases up the crushing and masticating work. The food pusher also acts as a lid for the wide mouth juicer, to prevent pests getting in when not in use.