An E mechanism facilitates a clearer, more easily attainable and in-tune high E on the flute. This is done by splitting the 1st and 2nd G keys, which are normally connected to move down together, as shown on the inline illustration below.
When a flute has an E mechanism, the 1st and 2nd G keys are split, and can operate independently. There is also an extra rod connecting the E key with the 2nd G key, so that when the E key is depressed, the 2nd G key is closed while the 1st G key remains open, which makes a high E sound and feel better,
The majority of modern student flutes now come with an E mechanism as standard.
