SolitaryManHello, thank you for your attention on our handmade silver and fossil wood pens, actually we have both (roller and fountain pen) available here on this Drop. Then if you purchase a roller pen and then after you purchase a fountain pen point section is possible to use it as fountain pen (is enough you do not use converter refilling system but only international standard cartridges since the converter end will not fit the end of the barrel since too long). Then the contrary (from fountain to roller pen) isn't possible since the roller refill will drop inside the fountain pen barrel too long for it).
I remain at your disposal! Best regards from aosta Velly, Italy. Maurizio