Using these hooked knife blades is a breeze. First, open the dispenser and take out a blade. Then, insert it into your utility knife according to the knife's instructions. When cutting, apply steady pressure and let the blade do the work. Remember, these blades are sharp, so always handle them with care. Keep them away from children and pets. After use, put the used blade back into the dispenser to avoid accidental cuts. To maintain the blades, store them in a dry place. If they get dirty, you can gently wipe them with a clean cloth. That's all you need to know to get the most out of these great blades.