Standard-duty, snap-off blade is idea for general crafts, cutting wallpaper, etc. This blade made from high quality carbon tool steel is produced using OLFA precise multi-step production process for unparalleled sharpness and superior edge retention. Long lasting, durable snap-off blade - a new sharp edge with each snap. This 9mm blade fits OLFA Standard-Duty Knives. 13 cutting edges per blade.