Using this knife is easy. To open it, simply use your thumb to release the liner lock and unfold the blade. You can use it for various tasks like opening packages or cutting small items. When you're done, close it by pressing the liner lock and folding the blade back in. For safety, always keep your fingers away from the blade when opening or closing. As for maintenance, after each use, wipe the blade with a dry cloth to keep it clean. Avoid leaving it in wet conditions for a long time as it may cause rust. Occasionally, you can oil the blade lightly to keep it in good working condition. With proper care, this knife will serve you well for a long time.