B footjoint: A footjoint that extends the length of the flute and adds one more key, thus allowing the instrument to reach down to low B-natural below middle C. The B footjoint is a standard choice on many step-up and professional instruments, especially when playing contemporary compositions that utilize an extended range.

C footjoint: Most commonly seen on student instruments, but available on any type of flute, the C foot reaches down to middle C. A C footjoint offers less resistance and a lighter weight than a B footjoint.

D# roller: Mounted on the D# key, the roller helps the fingers slide from the D# key to lower keys on the footjoint.

French model flute: Also known as an open hole flute, the French model flute has venting holes on the A,G,F,E, and D keys.

Plateau model flute: Also known as a closed hole flute. Plateau models do not have any venting holes.

Inline G: Refers to the placement of the G keys. Inline G keys are placed in a straight line across the body of the flute. G keys can also be placed at an angle, which is called offset G.

Offset G: Offset G keys are mounted at a slightly different angle on their own posts. Many flute players consider offset G to be a more comfortable alternative than inline G.

Gizmo key: Also known as a high C facilitator. When depressed, this key helps the player produce a clearer C-natural in the fourth octave.

E mechanism: Reduces the air vented while fingering a high E, thus allowing a more stable and consistent response.

C# trill: A lever which activates a key over an extra C# tone hole, making it easier to trill from B to C# as well as a number of other trills that many flutist find difficult to finger.

Y-arm key construction: A key style that connects keys to the rod with a Y-shaped piece soldered to the key cup. Y-arms are most commonly found on student and step-up instruments and because of their durability and less time-consuming manufacturing process.

French pointed key arms: French pointed arms connect keys to the rod with an arm that extends to the center of the key. Pointed arms require a high level of craftsmanship and are more commonly found on premium step-up and professional flutes.