Using this Deejo knife is a breeze. Just open it with the liner lock system and you're ready to use it for various tasks. When using, make sure to keep your fingers away from the blade to avoid cuts. After use, clean the blade with a dry cloth to prevent rust. Store it in a dry place. Don't use it to cut extremely hard objects as it may damage the blade. Periodically check the liner lock for proper functionality. If the handle gets dirty, you can gently wipe it with a damp cloth and dry it thoroughly.