This is the most common specification for closed hole flutes. The G keys are built on their own rod, separate from the rest of the main action key work, hence making them slightly out of line with the rest of the keys. Open hole flutes can also be made ‘offset’. The main advantages to offset G keys are that the ring finger on the left hand is, generally, in a more comfortable position and that an E mechanism can be fitted reliably without the binding problems inherent in 'In-Line' mechanism. Open holes with offset G keys has become much more popular in recent years.