200 Pack single edge razor blades are made of high-quality carbon steel with hardness reaching HRC 58~64, our blades are sharper and durable in various cutting tasks. Ultra-high performance one edge razor blades are made from SK5 steel with precision-ground edges for long-lasting cutting. 1.5" x 3/4" blades fit standard scrapers and single edge blade knives or tools. Razor Blades single edge design provides better control and safety during use; Can be handheld directly to perform precision and delicate cutting or scraping. Rust-resistant coating ensures long-term use and storage of the blade. Straight edge razor blades are placed in a paper box for easy storage and finding; each blade is individually wrapped with rust-proof wax paper for safe access. These blades are widely used and can easily complete heavy-duty cutting tasks, cutting tough materials such as leather, cardboard, and plastic, also suitable for scraping paint, cutting paper, DIY projects, etc.; they are ideal for professionals and home use. Made of premium carbon steel, these single edge razor blades are sharp and durable, ensuring long-lasting performance for various cutting tasks. The single edge design provides better control and safety during use; Rust-resistant coating ensures long-term storage. All blades were individually wrapped by antirust waxed paper; These safety razor blade refills fit all standard razor scrapers. Designed for heavy-duty cutting tasks, these straight edge razor blades can easily cut tough materials like cardboard, leather, and plastic. Includes 200 pieces of single blade razors, perfect for crafting, box cutting, scrapbooking, DIY projects, and more; Ideal for both professional and home use.