Our most popular blade design, the APBL-7008-0000 carbon steel blades are the perfect all-purpose single edge blade. Fitted with an aluminum back, these .009'' thick blades fit all standard single edge razor blade tools. Blades come unwrapped for ease of use. These blades are used in a wide range of industries including janitorial, wallpapering, foam molding, optical, upholstery, auto tinting, and more.