Using this DeWalt utility knife is easy. To change the blade, simply press the button to remove the old blade and then move the slide forward to load a new one. When you're done using it, fold it up for easy storage and carrying. Keep it in your tool belt using the belt clip for quick access on the jobsite. For safety, always make sure the blade is retracted when not in use. When it comes to maintenance, keep the blade clean and dry to prevent rust. If the knife gets dirty, you can wipe it down with a dry cloth. Since it has a durable construction, it should last a long time, but if you encounter any issues, remember it comes with a limited lifetime warranty.