Using the DeWalt DWHT11131L carbide utility blades is a breeze. For general - purpose tasks like cutting cardboard, plastic, or thin wood, just insert the blade into a compatible utility knife. Make sure the blade is firmly secured before starting your work. When using, apply a steady and even pressure. Don't force the blade through tough materials as it might cause the blade to break. As for maintenance, after each use, wipe the blade clean with a dry cloth to remove any debris. Store the blades in a dry place, away from moisture to prevent rusting. If you notice the blade is getting dull, it's time to replace it with a new one from the pack of 50.