How do I refill correctly a ballpoint pen?

By turning the cap clockwise, the refill comes out automatically (fig.1). By turning counterclockwise, even with one hand only, thanks to the automatic return you can retract the refill again (fig. 2). To replace the refill, turn the cap anticlockwise until it is completely unscrewed (fig. 3). Insert a new Aurora refill available in different colors and different tips. Once the refill replacement operation has been carried out, take care to push the cap downwards and screw it in clockwise as far as it will go (fig. 4).