Premium High Carbon Steel: Constructed of high-quality SK5 carbon steel for extra durability and long life. With HRC 60~65 hardness, these scraper razor blades stay sharp longer compared to ordinary blades Wide Application: These single-edge razor blades are perfect for scraping and cutting projects such as removing paint, labels, stickers, and decals from tiles, glass, windows, and doors, or for quickly opening packages Sharp Cutting Edge: single-edge blades feature a sharp, long-lasting edge, delivering optimum cutting performance. The steel backing provides a better feel and control, making it great for general scraping and cutting Universal Razor Blades: The razor blades are single-edged, with a size of 1.53-inch length, 0.77-inch width, and 0.009-inch thickness. These replacement blades are designed to fit all standard razor blade scrapers and box cutters 5.Convenient Packaging: Each pack includes 200 scraper blades, packed inside a transparent case for convenient blade storage or easy retail display. All blades come individually wrapped and protected in paper for added safety