ToughBuilt® utility knife blades keep your utility knife working optimally throughout the most rigorous jobs. They're made from durable, precision-honed carbon steel to provide long-lasting use. The straight edge blades deliver precise and accurate cuts on a variety of materials, including carpet, cardboard, drywall, leather, rubber, vinyl flooring, and more. Designed to fit all ToughBuilt® utility knives and upgrade standard utility knife blades, these blades are built to meet the pro's rigorous demands.