Not only snap-off blades but also NT offers solid blades with no snap-off lines for both standard duty and heavy duty utility knives . Solid blades are especially used in the food processing factories or any manufacturing factories where extra precautions must be taken to prevent blade from chipping and accidentally mixing into the product. These professional blades are made of high quality carbon tool steel and produced through multiple stages of precise process to obtain the ultimate sharpness and optimum edge-retention. Bulk packed for industrial use. Made in Japan.