It may have been mentioned earlier..When you purchase a light duty/ modelmaker's flush cutter, the blades do not quite met. I carefully use the side of a low grit hone to get them to meet exactly. Then I polish them on a piece of 1k+ sand paper. They last longer that way.
** The blades are often made to slightly bypass each other. That is so there is not a sudden shock to break the plastic parts they were designed to clip from a sprue.**
Respectfully
~Richard