These utility blades are designed for general cutting. The sharp edge provides consistent cuts and a long cutting life. These blades work with most standard utility knives. Fits most utility knives5 blades per card2 in. wide, regular duty blade, a thinner, more flexible blade for use where light, thick sheet materials such as corrugated cardboard may "choke" the blade, fits knife 10-519 (2512-2771)