Heavy-duty, snap-off blades are designed for a wide variety of applications. Easily cuts through paper, cardboard, styrofoam, rubbers, wallpaper, photos, plastics and more. Made from high quality carbon tool steel. Eight cutting edges per blade. Heavy-duty blades featuring Olfa s original snap-off blade design. Replacement blades for the OLL-1, OLL-2 and OLNOL-1 Heavy-Duty Cutters. Each 18mm blade comes in eight sharp, snap-off sections. Six pack has 48 cutting edges, ten pack has 80 cutting edges and 50 pack has 400 cutting edges.