Standard Size: The size of the blade is a universal size. And the blade can be used as a replacement blades for box cutter and utility knife. Thickness: 0.0236 inch / 0.6 mm Sharp Cutting: The edge of the utility knife blades are precisely polished, so the box cutter blades cut quickly and smoothly. It is also suitable for cardboard, rubber, carpet, leather, wallpaper, plastic, PVC and other materials High Quality Material: The utility blades are made of SK5 alloy steel, which has higher hardness, better wear resistance and longer service life than ordinary blades Portable Packaging: 50 SK5 box cutter blades refills are packed in a well constructed box, which is not only convenient to take, but also convenient to use carry and store for you Multipurpose Use: Sharp utility razor blades can help you effectively improve your work productivity. Therefore, the blade is not only suitable for home and office use, but also suitable for warehouses and construction sites use