100 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. single edge razor blade set includes 100 meticulously crafted blades