ToughBuilt utility knife blades keep your utility knife working optimally throughout the most rigorous jobs. Made from durable, precision-honed carbon steel to provide long-lasting use. The straightedge blades deliver precise and accurate cuts on a variety of materials including carpet, cardboard, drywall, leather, rubber, vinyl flooring and more. Made to fit all ToughBuilt utility knives and upgrade standard utility knife blades, these blades are built to meet the pros' rigorous demands. Precision-honed carbon steel delivers precise, accurate cuts, Designed for long-lasting use, Straight edge, Blade replacement is easy, just press a button and pull, Fits all ToughBuilt utility knives and other utility knives that use standard blades.