The drill staff, also called the drill of Onua, was Turaga Whenua's tool and badge of office. It was an altered version of the earthshock drills Whenua carried as a Toa Metru; it transformed when he became a Turaga.1
Notes
Turaga Whenua's tool was the Drill of Onua.2
As a Turaga, Whenua carried the drill of Onua3