High-quality stainless steel blade for use in moist environments Stainless steel snap-off blades for use in moist environments (wallpapering, window films, etc.) where rust is a concern. Made of high-quality Japanese grade stainless steel and designed for unparalleled sharpness and superior edge retention. Long lasting and durable- a new sharp edge with just a snap. Fits OLFA 9mm knives. 13 cutting edges per blade. 50 blades per pack. Olfa North America.