These micro wire cutters are used for many things. I cut the filament ends before feeding them into my 3D printer. They also help me to nibble at the supports of prints.
Micro cutters allow greater precision and are far safer than hacking a print up with a blade.
Buy a 5-pack of micro-cutters that are cheap. They’re great for cutting all kinds of things. And you can toss them when they become blunt.