Break the old blade:
Find the dotted line on the blade, which is designed to assist in breaking.
Use the metal frame or gap on the back of the utility knife to align the position to be broken.
Twist it hard and you can easily break off the blunt part.
Replace the entire blade:
Note the movable part at the bottom of the utility knife blade (usually the black part) and pull it down hard.
After pulling it out, you will see a gap at the bottom, which can be used to clamp the old blade, and then gently break it out.
Take out the new blade, be careful not to cut your hand, align it with the protrusion inside the blade, and push the new blade in.
After ensuring that the blade is firmly installed, put the black part at the bottom of the blade back in place.
Please note that you must be careful during the operation to prevent the blade from cutting you.
Utility Knife Recommendations
