Arte Italiana, 360 e Ogiva Fitting Rollerball and 360 ballpoint refills 1 Unscrew the barrel tip anti-clockwise to remove it from the barrel. 2 Remove the old refill. 3 Fit the end of the new refill in the recess in the knob. 4 Screw the barrel tip with the new refill clockwise on to the barrel until it is tight.